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2006 Vol. 26, No. 11 Published: 2006-11-26

光谱学与光谱分析

	1969	Studies of Benzoic Acid and Its Methyl Substitutes by Using Laser Flash Photolysis
		ZHAO Hong-wei, WANG Wen-feng,YAO Si-de
		In the present paper the photo-ionization and properties of excited state of benzoic acid and its methyl substitutes were studied using 248 nm laser flash photolysis. The quantum yields of hydrated electrons produced from photo-ionization, the life-time of excited triplet, and the self quenching rate constants were also determined. It is shown that there isn’t significant effect of different position of methyl residue at benzene ring on its excited triplet. The resonant excitation of triplet of benzoic acid was explored by the use of two-steps laser flash photolysis. The possible upper excited state and radical involved in the processes were guessed.
		2006 Vol. 26 (11): 1969-1972 [Abstract] ( 425 ) PDF (576 KB) ( 428 )

	1973	New Mobile Lidar for the Measurement of Tropospheric Aerosol
		XIE Chen-bo, MAO Min-juan, YUE Gu-ming, QI Fu-di, FAN Ai-yuan, ZHOU Jun
		A new mobile lidar system has been developed for measuring tropospheric aerosol. Its main structure and specification as well as lidar data processing method are described. The results of measurement over Hefei city show that this lidar has ability to gain profiles of tropospheric aerosol day and night, and to manifest aerosol temporal and spatial distributions with high precision.
		2006 Vol. 26 (11): 1973-1976 [Abstract] ( 1126 ) PDF (506 KB) ( 431 )

	1977	Studies on the Electron Transfer between Etoposide (VP-16) and DNA
		ZHANG Rui¹, SHI Jun^1，2,WANG Shi-long^1*, SUN Xiao-yu¹, ZHANG Chao-jie¹
		In the present study, the electron transfer between Etoposide (VP-16) and GMP or DNA was investigated using pulse radiolysis and circular dichroism technology. The electron transfer between VP-16 and GMP was found, and the reaction rate constant was determined as 3.16×10⁷ L·mol^-1·s^-1 by pulse radiolysis. The authors found the interaction of VP-16 and DNA using the technology of circular dichroism. This study has provided theoretical reference for further study on the anti-tumor mechanism of VP-16.
		2006 Vol. 26 (11): 1977-1980 [Abstract] ( 1488 ) PDF (481 KB) ( 426 )

	1981	Study of Resonance Exchange Collisions in Cesium Vapour by Optical-Optical Double Resonance Spectroscopy
		WANG Shu-ying,MU Bao-xia,CUI Xiu-hua,ZHANG Gang-tai,YUAN Qiang-hua,DAI Kang,SHEN Yi-fan^*
		An experimental study of cesium resonance exchange collision, Cs(6P_3/2, v) +Cs(6S_1/2, v′)→Cs(6S_1/2, v)+Cs(6P_3/2, v′) , was carried out. Populations of excited atoms that all have the same z component of velocity were produced by pumping a vapor with a narrow-band laser. A counterpropagating single-mode diode laser was used to probe the excited atom velocity distribution in the 6P_3/2→8S_1/2 transition. Fluorescence was monitored in the 8S_1/2→6P_3/2 transition. The magnitude of the thermalizinng effect of resonance exchange collisions was estimated by measuring the ratio of the intensity in the narrow features to that associated with the Doppler pedestals. The rate coefficient of 9.62×10^-7 cm³·s^-1 for the resonance exchange collisions was yielded. This work demonstrates that, in a pure metal vapor, the thermalization of velocity-selected excited-atom distribution by the mechanism of resonance exchange can be three orders of magnitude greater than that from velocity-changing collisions.
		2006 Vol. 26 (11): 1981-1983 [Abstract] ( 1548 ) PDF (330 KB) ( 438 )

	1984	Correlativity Analysis Based on Radiation Spectrum of Correlated Color Temperature and Thermodynamic Temperature of a Radiating Source
		FU Tai-ran¹, CHENG Xiao-fang², ZHONG Mao-hua¹, YANG Zang-jian²
		Correlated color temperature, which describes the chromaticity characteristics of a radiating source, is different from its thermodynamic temperature derived from primary spectrum pyrometry. However, establishing their mathematical relationship is feasible. Therefore, the authors theoretically analyzed the variation rule of the correlativity difference between the correlated color temperature of the source and its thermodynamic temperature with the emissivity parameter. And the authors gave the corresponding numerical simulation results. The above theoretical and numerical discussions will make it possible that a colorimeter used to measure the correlated color temperature serves as a pyrometer to realize the measurement of the thermodynamic temperature.
		2006 Vol. 26 (11): 1984-1987 [Abstract] ( 526 ) PDF (381 KB) ( 435 )

	1988	Temperature Study on Lightning Return Stroke in the Coastal Area of Guangdong
		OUYANG Yu-hua¹,YUAN Ping^{1, 2}, QIE Xiu-shu²,WANG Huai-bin²,JIA Xiang-dong³, ZHANG Hua-ming¹
		In the coastal area of Guangdong, slit-less spectra for first return strokes of lightning between the cloud and ground were obtained. After spectrum analysis and line identification were done by using multi-configuration Dirac-Fock (MCDF) method, parameters like wavelengths, oscillator strengths, transition probabilities, and excitation energies were calculated. According to the relative intensities of lines and transition parameters, temperatures for individual lightning strokes and at different heights of the discharge channel were calculated by using multiple-line method. The result shows that the temperatures in return stroke channel varied from stroke to stroke. In general, the more intensive the lightning discharge, the higher the value of channel temperature. On the other hand, for a certain return stroke channel, the temperatures at different positions show signs of falling away with increasing height along the discharge channel. Compared with that of Qinghai plateau, lightning in Guangdong coastal area is more intensive, and the lines from higher excitation potential of NⅡ in these lightning spectra are easier observed.
		2006 Vol. 26 (11): 1988-1992 [Abstract] ( 2241 ) PDF (600 KB) ( 410 )

	1993	Experimental Investigation of CAEP Far-Infra-Red 100 μm FEL Spontaneous Emission
		BIAN Qing-quan¹,YANG Zhen-ping²,LI Zheng-hong³
		In the FEL experiment, when electron beam passes through the wiggler, the movement of electron beam will be changed to wiggle in the wiggler due to the periodical magnet field. Meanwhile the electron beam will spontaneously emit the radiation with a wavelength similiar to the FEL radiation. This radiation is influenced by the parameters of both the electron beam and the wiggler. The gain of FEL was determined by the spontaneous emission spectrometer, and the spectrum width mainly determined by the periods of wiggler and electron energy homogeneity (ΔE/E). According to the measured parameters of electron beam and the wiggler, the spontaneous emission was studied. In the experiment, the spectrum of the spontaneous emission was measured by far infrared 100 μm spectrometer with Ge∶Ga detector.
		2006 Vol. 26 (11): 1993-1995 [Abstract] ( 1665 ) PDF (351 KB) ( 439 )

	1996	Ru(bpy)²⁺₃ Electrochemi-luminescence of Screen-Printed Electrodes for Low Cost Disposable C₂O^2-₄ Sensor
		LIN Zhen-yu, CHEN Jin-hua, SUN Jian-jun, CHEN Guo-nan^*
		The present paper reports the establishment of an electrochemi-luminescence (ECL) sensor by using screen-printed electrodes(SPE) which contain Ru(bpy)²⁺₃. The method of making the SPE and the fix of Ru(bpy)²⁺₃ were studiedin detail. The characters of the sensor were studied.The sensor has been applied to detect C₂O^2-₄ in solution. Under optimised conditions, at 1.55 V vs Ag/AgCl, in 0.2 mol·L^-1 phosphate buffer solution (pH 6.0), the linger range extends from 3.0×10^-7 mol·L^-1 to 1.0×10-5 mol·L^-1, the detection limit is 1.2×10^-7 mol·L^-1 (S/N=3). The sensors have good stability and reproductivity. It should be noted that based on the same principle, the sensors can be applied to detect many other compounds, such as amino acids, TprA and NAD. If the screen machine is used to make the SPE, the reproductivity and stability of the SPEs can be improved further.
		2006 Vol. 26 (11): 1996-1999 [Abstract] ( 1553 ) PDF (524 KB) ( 397 )

	2000	Preparation and Luminescence Properties of Core-Shell ZnS∶Cu/ZnS Nano-Particles
		CAO Li-xin, SUN Da-ke, LIN Ying-xia
		Core-shell structured ZnS∶Cu/ZnS nano-particles and Cu²⁺-doped ZnS nano-particles without any shell were prepared, and the effect of ZnS shell on the luminescence properties of ZnS∶Cu²⁺ nano-particles was studied. The observed emission peak at 450 nm was assigned to the recombination of an electron from the shallow delocalized donor levels at the t₂ level of Cu²⁺. The ZnS shell did enhance the luminescence at 450 nm, which resulted from the reduction of nonradiative recombination sites.
		2006 Vol. 26 (11): 2000-2002 [Abstract] ( 1139 ) PDF (401 KB) ( 425 )

	2003	Synthesis and Luminescence Properties of Ternary Complexes of Europium with Aromatic Carboxylic Acid and Acrylonitrile
		GUO Dong-cai^{1, 2}, YI Li-ming¹, SHU Wan-gen², ZHANG Zhen-zhen¹, ZENG Zhao-rong¹, ZHANG Xi-qian¹
		Five ternary complexes were synthesized from europium with aromatic carboxylic acid(p-methylbenzoic acid, methoxybenzoic acid, m-chlorobenzoic acid and benzoic acid, p-hydroxylbenzoic acid) and acrylonitrile, and characterized by means of elemental analysis, thermal analysis, FTIR spectra and UV spectra. The fluorescence spectra show that five ternary complexes have good luminescence properties, and the sequence of the ability of the aromatic carboxylic acids to transfer light energy to europium ion is as follows: p-methylbenzoic acid＞benzoic acid＞m-chlorobenzoic acid＞p-hydroxylbenzoic acid＞methoxybenzoic acid. Meanwhile, the ternary europium complexes containing a reactive ligand acrylonitrile will possibly have a potential application to the fabrication of bonding-type europium polymer luminescent materials.
		2006 Vol. 26 (11): 2003-2006 [Abstract] ( 1241 ) PDF (433 KB) ( 392 )

	2007	Fabrication and Spectral Analysis of a Novel Panel Full Color Device
		NIU Lian-bin^1，2,XU Zheng^{2, 3}, TENG Feng²,ZHANG Fu-jia^1*, WANG Yong-sheng², XU Xu-rong²
		It is demonstrated that a new solid-state cathodoluminescence device based on accelerated electron in SiO₂ can be fabricated using organic light emitting materials as a fluorescent film. This device (the device of sandwiched structure) is composed of a glass substrate, an ITO layer, a double SiO₂ films, and an organic fluorescent film. When a bias voltage is applied to the devices, they can uniformly emit red, green, and blue light. To some extent, when the voltage is low, the red (green) emission is obtained;and when the voltage is high, the blue emission is acquired. These emissions belong to the solid-state cathodoluminescence, they originate from the accelerated electrons in SiO₂, which bombard the organic layers. Their devices have achieved full color (RGB) lighting and improved blue emitting.
		2006 Vol. 26 (11): 2007-2010 [Abstract] ( 556 ) PDF (557 KB) ( 383 )

	2011	Application of Single-Band Brightness Variance Ratio to the Interference Dissociation of Cloud for Satellite Data
		QU Wei-ping^{1, 2}, LIU Wen-qing¹, LIU Jian-guo¹, LU Yi-huai¹, ZHU Jun¹, QIN Min¹, LIU Cheng³
		In satellite remote-sensing detection, cloud as an interference plays a negative role in data retrieval. How to discern the cloud fields with high fidelity thus comes as a need to the following research. A new method rooting in atmospheric radiation characteristics of cloud layer, in the present paper, presents a sort of solution where single-band brightness variance ratio is used to detect the relative intensity of cloud clutter so as to delineate cloud field rapidly and exactly, and the formulae of brightness variance ratio of satellite image, image reflectance variance ratio, and brightness temperature variance ratio of thermal infrared image are also given to enable cloud elimination to produce data free from cloud interference. According to the variance of the penetrating capability for different spectra bands, an objective evaluation is done on cloud penetration of them with the factors that influence penetration effect. Finally, a multi-band data fusion task is completed using the image data of infrared penetration from cirrus nothus. Image data reconstruction is of good quality and exactitude to show the real data of visible band covered by cloud fields. Statistics indicates the consistency of waveband relativity with image data after the data fusion.
		2006 Vol. 26 (11): 2011-2015 [Abstract] ( 1611 ) PDF (822 KB) ( 385 )

	2016	Feasibility of Using Near-Infrared Reflectance Spectroscopy for the Analysis of Compositions of Straw Silage
		LIU Xian^1，2, HAN Lu-jia^1，2*
		Near-infrared reflectance spectroscopy (NIRS) calibrations of chemical composition in 158 straw silage samples were developed by means of partial least-squares (PLS) regression. Results showed that the correlation coefficients of calibration (R²) were 0.95，0.90，0.86，0.91，0.86，0.95 and 0.90 for crude protein, neutral detergent fibre, acid detergent fibre, hemicellulose, dry matter, crude ash and acid detergent lignin respectively;the R² of pH, lactic acid, acetic acid, propionic acid, butyric acid and ammonia were 0.98，0.83, 0.85，0.36，0.90 and 0.92 respectively. The RPD (SD/SECV) of these parameters were all greater than 2.5 except acetic acid, propionic acid and butyric acid, and the correlation coefficients of validation (R²_v) of the parameters were all greater than 0.80 except lactic acid, acetic acid, propionic acid and butyric acid. These results are of great practical importance in rapid evaluation of silage quality.
		2006 Vol. 26 (11): 2016-2020 [Abstract] ( 1658 ) PDF (553 KB) ( 465 )

	2021	Study on Fast Discrimination of Varieties of Acidophilous Milk Using Near Infrared Spectra
		HE Yong, FENG Shui-juan, LI Xiao-li,QIU Zheng-jun^*
		A new method for the discrimination of varieties of near acidophilous milk by means of near infrared spectroscopy(NIRS) was developed. Firstly, through the principal component analysis (PCA) of spectroscopic curves of 5 typical kinds of acidophilous milk, the clustering of acidophilous milk varieties was processed. The analysis results showed that the cumulate reliabilities of PC1 and PC2 (the first two principal components) reached 98.96%, and the cumulate reliabilities of PC1 to PC7 (the first seven principal components) were 99.97%. Secondly, a discrimination model of artificial neural network (ANN-BP) was set up. The first seven principal components of the samples were applied as ANN-BP inputs, and the values of type of acidophilous milk were applied as outputs, then the three layer ANN-BP model was build. In this model, every variety of acidophilous milk includes 27 samples, the total number of samples is 135, and the rest 25 samples were used as prediction set. Calculation results showed that the distinguishing rate of the five acidophilous milk varieties was 100%. This model is reliable and practicable. So a new approach to the rapid and lossless discrimination of varieties of acidophilous milk was put forward.
		2006 Vol. 26 (11): 2021-2023 [Abstract] ( 2051 ) PDF (355 KB) ( 509 )

	2024	Application of Wavelet Transform to Infrared Analysis
		LI Dan-ting¹, ZHANG Chang-jiang², WANG Jin²,CHENG Cun-gui^1*
		In the present article the FTIR spectra of the xylems of Smilax glabra Roxb. and its three kinds of counterfeits were obtained by Fourier transform infrared spectroscopy (FTIR) with OMNI-sampler directly, fast and accurately. By adopting wavelet transform analytical method the samples were studied in detail. The results showed that wavelet transform could remove the noises and condense variable, and have the advantages of fast operating speed, high degree of accuracy, and no noise disposal. It will have a good application prospect in infrared spectroscopic analysis.
		2006 Vol. 26 (11): 2024-2026 [Abstract] ( 1671 ) PDF (388 KB) ( 443 )

	2027	Study on the Application of Pyroelectric Infrared Sensor to Safety Protection System
		WANG Song-de,ZHANG Shuan-ji,ZHU Xiao-long,YANG Jie-hui
		Using the infrared ray of human body, which is received and magnified by pyroelectric infrared sensor to form a certain voltage control signal，and using the control signal to trigger a voice recording-reproducing circuit，a pyroelectric infrared detector voice device with auto-control function designed. The circuit adopted new pyroelectric infrared detector assembly and voice recording-reproducing assembly. When someone is present in the detectable range of the pyroelectric infrared detector，first, the pyroelectric infrared sensor will transform the incepted radiation energy to a electric signal，which is then magnified and compared by an inside circuit, and an output control signal，touches off the voice recording-reproducing assembly with the reproducer sending out a beforehand transcribed caution voice to wise the man who does not know well the surrounding condition that the frontage is a danger zone and should not be approched. With the design of integrated structures, the distance-warning device has the advantages of strong anti-jamming ability, low temperature resistance, working stability and use-convenience, and it can be suitably installed and used in several locations which may endanger person safety, such as substation, high voltage switch panel, electric transformer, etc.
		2006 Vol. 26 (11): 2027-2029 [Abstract] ( 2047 ) PDF (433 KB) ( 469 )

	2030	Raman Spectrometry of Several Saturated Fatty Acids and Their Salts
		LUO Man¹, GUAN Ping^1*, LIU Wen-hui², LIU Yan³
		Saturated fatty acids and their salts widely exist in the nature, and they are well known as important chemical materials. Their infrared spectra have been studied in detail. Nevertheless, few works on the Raman spectra characteristics of saturated fatty acids and their salts have been published before. Man-made crystals of acetic acid, stearic acid, calcium acetate, magnesium acetate, calcium stearate and magnesium stearate were investigated by means of Fourier transform Raman spectrometry for purpose of realizing their Raman spectra. Positive ions can cause the distinctions between the spectra of saturated fatty acids and their salts. The differences in mass and configuration between Ca²⁺ and Mg²⁺ result in the Raman spectra’s diversity between calcium and magnesium salts of saturated fatty acids. Meanwhile, it is considered that the long carbon chain weakened the influence of different positive ions on the salts of saturated fatty acids.
		2006 Vol. 26 (11): 2030-2034 [Abstract] ( 1221 ) PDF (471 KB) ( 498 )

	2035	Surface Coordination Chemistry of Benzotriazole Probed by Electrochemical Raman Spectroscopy
		YUAN Ya-xian, WEI Ping-jie, YAO Jian-lin^*, GU Ren-ao
		The surface coordination chemistry of benzotriazole (BTAH) at silver electrode was investigated by in situ electrochemical surface enhanced Raman spectroscopy (SERS) and electrochemical synthesis in the acetonitrile solution. In situ SERS studies revealed that BTAH underwent three processes of chemical adsorption of BTAH, formation of compact layer of (AgBTA)_n and the loss of SERS activity due to the oxidation of silver. The surface coordination processes of BTAH with Cu, Ag, Zn, Ni and Fe were investigated and the surface complexes prepared by direct electrochemical synthesis method were characterized by microanalysis and Raman spectroscopy. The influence of the neutral ligand of triphenylphosphine (pph₃) on the coordination process was deduced. The introduction of pph₃ was found to affect the surface processes of BTAH with Cu and Ag, and appeared in the final complex, while it had no influence on the coordination of BTAH with Zn, Ni and Fe.
		2006 Vol. 26 (11): 2035-2038 [Abstract] ( 416 ) PDF (471 KB) ( 407 )

	2039	XRD and Raman Spectroscopic Comparative Study on Phase Transformation of γ-Al₂O₃ at High Temperature
		FANG Ping, HE Mai, XIE Yun-long, LUO Meng-fei^*
		The phase transformation of γ-Al₂O₃ at high temperature was characterized by XRD and Raman techniques. Raman results show that under the excitation at 632.8 nm, the Raman shift bands at 1 175 and 1 241 cm^-1 and the other two bands at 1 370 and 1 400 cm^-1 are attributed to the Cr³⁺ and (or) Fe³⁺ fluorescence bands in θ-Al₂O₃ and α-Al₂O₃ environments respectively. Compared with XRD measurements, it is more sensitive to use these two groups of Raman bands to estimate the phase formation and transformation of θ-Al₂O₃ and α-Al₂O₃. Therefore, Raman spectroscopy can deduce the high temperature phase transformation effectively. Experiments results show that γ-Al₂O₃ starts to transform to θ-Al₂O₃ and α-Al₂O₃ synchronously at 800 ℃, but the nature of the sample determines the final temperature of transforming to α-Al₂O₃.
		2006 Vol. 26 (11): 2039-2042 [Abstract] ( 1303 ) PDF (408 KB) ( 524 )

	2043	Studies of Laser Raman Spectra of ZnCl₂ Solution Effected by Environmental Light
		LIU Wen-han, ZHANG Dan, WU Xiao-qiong, ZHENG Jian-zhen
		The laser Raman spectra influenced by environmental light were studied in the determination of ZnCl₂ solution. The environmental light included the natural light from outdoors and the light from indoor fluorescent. The results show that different influences on the laser Raman spectra of ZnCl₂ solution can be produced in different environmental light. There were some characteristic spectral lines, minus peaks or sharpened peaks. These influences cannot be ignored. The determinations of laser Raman spectra must be made in darkroom or in the sheathing or mantle etc.
		2006 Vol. 26 (11): 2043-2045 [Abstract] ( 1555 ) PDF (326 KB) ( 429 )

	2046	Spectral Analysis of the Structure of Trans/Cis-1,2-Dicyano- (p-Ethylphenyl)alkene
		CHEN Zhi-min^{1, 2}, WU Yi-qun^{1, 2*}, ZUO Xia¹
		Two precursors of soluble tetraazaporphrins, trans-1,2-dicyano-(p-ethylphenyl)alkene and cis-1,2-dicyano-(p-ethylphenyl)alkene, were synthesized. Their structures were confirmed by elemental analysis, FTIR, UV-Vis, GC/MS and ¹H NMR. The differences in isomer structures of the trans and cis-1,2-dicyano-(p-ethylphenyl)alkenes were represented by the obvious differences in the spectra of UV-Vis, FTIR and ¹H NMR. In addition, the reasons for the differences were also analyzed.
		2006 Vol. 26 (11): 2046-2049 [Abstract] ( 377 ) PDF (448 KB) ( 395 )

	2050	Study on UV-Vis Absorption Spectra of Tetra-Azo-Aromaticoxy Substituted Metallophthalocyanines
		XUE Jin-ping, HONG Hu-ming, YE Ting-xiu, FAN Chang-an，SUN Gang-chun, CHEN Nai-sheng^*, HUANG Jin-ling
		UV-Vis absorption spectras of six series (18 kinds) of tetra- azo-aromaticoxy substituted metallophthalocyanines (R₄PcM, R=4-pyridyloxy，8-quinolinoxy，2-methyl-8-quinolinoxy;substitution position：α position and β position;M=Ni(Ⅱ), Cu(Ⅱ), Zn(Ⅱ)) were measured. The effects of central mentals，the kinds and the positions of substitution groups, and solvents on the metallophthalocyanines’ λ_max in Q-band were discussed. Experimental data show：The λ_max in Q-band of title complexes is about 680 nm. In contrast with substitution-free metallophthalocyanines(669-671 nm), the λ_max in Q-band of the title complexes with the same central metal exhibits a different red-shift. The effect of substitution group’s kinds on λ_max in Q-band of the title complexes is more obvious in α position than in β position, and with the same substitution group and central metal, λ_max in Q-band of α position substituted complexes exhibits more obvious red-shift than β position substituted complexes. The effects of central metal and solvent on λ_max in Q-band of the title complexes aren’t obvious.
		2006 Vol. 26 (11): 2050-2052 [Abstract] ( 2324 ) PDF (355 KB) ( 452 )

	2057	Study on the Method of Producing Doped Nanometer Thin Films by Microemulsion Based Inorganogels Process and Its Photocatalytic Capability
		ZHENG Huai-li^{1, 2}, YI Qian¹, TANG Ming-fang³, LI Hong²
		In the present, the method of producing doped nanometer thin films by microemulsion based inorganogels process and its photocatalytic capability were studied. The best match of ingredients in microemulsion process was studied. On the basis of that, ME-S2 self-cleaning glass was made. The ME-S2 self-cleaning glass experienced the experiment of cleaning dirt in actual waste water, experiment of superhydrophilic property, and X-ray diffraction spectroscopy. ME-S2 has excellent photocatalytic capability. This kind of glass has a certain extent of self-cleaning function, and the transmittance of ME-S2 remains better than the ordinary glass. ME-S2 has excellent superhydrophilic property.
		2006 Vol. 26 (11): 2057-2060 [Abstract] ( 1624 ) PDF (430 KB) ( 402 )

	2061	Meso-Tetraphenylporphyrinatozinc/TiO₂ Nanocompound Synthesized by In-situ Method and Photocatalysis under Visible-Light Irradiation
		LI Jing-quan, PAN Hai-bo^*, HUANG Jin-ling, CHEN Nai-sheng
		The meso-tetraphenylporphyrinatozinc/titanium dioxide (ZnTPP/TiO₂) nanocompounds with different molar ratios were synthesized by sol-gel method at 400 ℃, 4h. The nanocompounds were characterized by XRD, UV-Vis, FTIR and Fluorescence methods. Anatase for TiO₂ in the nanocompounds was defined, and ZnTPP was also obtained during in-situ process. Photocatalystic activities of them influenced by the proportion between ZnTPP and TiO₂ were discussed under visible light. The results show that a nanocompound (ZnTPP∶TiO₂=1∶100 mol%) has the best photocatalystic activity, and the degradation of Rhodanmine B is up to 92% after 150 minutes under visible light irradiation. The sensitization mechanism is that the photogenerated charge carriers are separated by Zn—O bond between ZnTPP and TiO₂.
		2006 Vol. 26 (11): 2061-2064 [Abstract] ( 1122 ) PDF (501 KB) ( 437 )

	2065	An Approach to Analyzing Laser Induced Fluorescence Spectrum of Dissolved Organic Matter
		LI Hong-bin^{1, 2}, LIU Wen-qing¹, ZHANG Yu-jun^{1, 2}, ZHAO Nan-jing¹, WANG Zhi-gang¹
		The method of laser induced fluorescence used to analyse dissolved organic matter (DOM) in water was discussed. The fluorescence spectrum was normalized by the intensity of Raman scattering for reducing some negative effect induced by the intensity of excitation, the fluorescence absorption by water, and receiving conditions etc. The fluorescence spectrum normalization theory was deduced, and a nonlinear concentration calibration mathematic model based on the normalization theory was presented. The mathematic model was adopted for nonlinear least-squares data fitting to process experimental data, and a high correlation coefficient excelling 0.99 was obtained. The experimental result indicated that the nonlinear concentration calibration mathematic model based on the consideration of the fluorescence absorption by water and the effect of different concentration of DOM on the absorption was applicable to quantitative analyzing DOM in different water as a general concentration calibration mathematic model.
		2006 Vol. 26 (11): 2065-2068 [Abstract] ( 2026 ) PDF (411 KB) ( 467 )

	2069	Fluorescence Emission Properties of Ni-Doped ZnO Films
		LIU Xiao-xue, CHENG Wen-juan, MA Xue-ming, SHI Wang-zhou^*
		Ni-doped ZnO films were deposited on Si(100) by pulsed laser deposition(PLD) at room temperature. Fluorescence emission properties of the films were measured using VARAIN Cary-Eclips 500 fluorescence spectrum analyzer. Two peaks centered respectively at about 360 and 380 nm were observed. The origin of the ultraviolet peak at 360 nm was investigated through doping Ni into the ZnO films. It was found that the intensity of this ultraviolet peak changed with Ni content while its position remained stable. The fluorescence emission of the samples was optimal when Ni∶ZnO was 5 mol%, indicating that the peak centered at 360 nm might originate from the composite transition between the splitting valence band and conduction band, not from the entrance of the impurity energy level into the conduction band after doping.
		2006 Vol. 26 (11): 2069-2071 [Abstract] ( 1171 ) PDF (405 KB) ( 419 )

	2072	Preparation of Composite of Poly(o-Methyl-Acrylamide-Benzoic Acid)/ZnO Nanoparticles and Its Property of Fluorescence
		DING Chun-hua, XU Qing-feng，LU Jian-mei^*
		The preparation of P(o-MAABA) via ATRP and the composite of P(o-MAABA)/ZnO nanoparticles were described. ¹H NMR, IR, TA and TEM were utilized to confirm the results. ¹H NMR indicates that the structure of the P(o-MAABA) was definite, and the molecule weight of P(o-MAABA) was 7 900. IR shows that ZnO nanoparticles were introduced to P(o-MAABA) and were interacted with the reactive groups of polymer. TA shows that the heat stability of P(o-MAABA))/ZnO composite increased greatly. TEM photo demonstrates that the composite was spherical and the surface was smooth. The P(o-MAABA)/ZnO composite exhibits particular fluorescence property, and the emission spectrum of the P(o-MAABA)/ZnO composite red shifts 25 nm compared to the polymer. In addition, the composite features good solubility and film formability, and may become a new optical material.
		2006 Vol. 26 (11): 2072-2075 [Abstract] ( 1730 ) PDF (464 KB) ( 469 )

	2076	Study of the Methods of Wavelet Feature Extraction and Neural Network Classification of Fluorescence Spectra to Improve the Diagnostic Rate of Colonic Earlier Stage Cancer
		XIA Dai-lin¹, MENG Hong-xia², ZHANG Yang-de³, HE Ji-shan⁴
		In order to improve the diagnostic rate of earlier stage colonic cancer with laser-induced 5-ALA-PpⅨ fluorescence spectra, a novel method of extraction of fluorescence spectral feature using wavelet analysis and classification using artificial neural network trained with resilient back-propagation algorithm (R-BPNN) was developed. 504 spectra were collected from 8 normal SD rats, and 20 1,2-DMH-induced SD colon cancer models and 12 second generation rats of induced rats. 150 min later trail intravenous injections of 5-ALA dose of 25 mg·kg-1 body weight (BW), and fluorescence spectra excited with 370 nm Ti-laser were collected in vivo. After preprocessing, 12 feature variants were extracted with wavelet analysis. With R-BPNN, all spectra were classified into two categories: normal or abnormal, which included dysplasia, early carcinoma (EC) and advanced carcinoma (AC). The sensitivity and specificity were 98.91% and 97.2% respectively. The accuracy of discriminating dysplasia, early carcinoma, and advanced carcinoma from normal tissue were 91.3%, 98.9% and 98.8% respectively. The result indicated that this method could effectively and easily diagnoses earlier stage colonic carcinomas.
		2006 Vol. 26 (11): 2076-2079 [Abstract] ( 2189 ) PDF (548 KB) ( 420 )

	2080	Study on the Fluorescence of Poly(amidoamine) Dendrimers Decorated with Coumarin-3-Methyl Acyl Chloride on the Periphery
		MO Zun-li^{1, 2}, LIU Yan-zhi¹, CHEN Hong¹, SUN Wan-hong¹, LI He-jun²
		The polyamidoamine dendrimers, PAMAM-CMAC, was synthesized by decorating PAMAM dendrimer with coumarin-3-methyl acyl chlorine on the periphery. The structures were characterized by FTIR and ¹H-NMR spectra. The fluorescence analysis indicated the PAMAM-CMAC exhibits strong fluorescence emission. The fluorescence intensity of PAMAM-CMAC is much higher than that of PAMAM dendrimer. The fluorescence intensity of PAMAM-CMAC was affected by pH, concentration and solvent. At a considerably big pH value range, the fluorescence emission of PAMAM-CMAC is comparatively stable. Meanwhile, the fluorescence emission of PAMAM-CMAC shifts to longer wavelength with the increase in solvent polarity.
		2006 Vol. 26 (11): 2080-2084 [Abstract] ( 1722 ) PDF (596 KB) ( 423 )

	2085	Study on the Determination of Multicomponent Pesticide Residual Based on Synchronous-Derivative Fluorimetry
		WANG Yu-tian，CUI Li-chao，WANG Dong-sheng，LI Yan-chun
		In the multicomponent fluorescence measurement of pesticide residual, the comparability of construction and chemical property among the components leads to the overlap of the fluorescence spectra, so it′s very difficult to do simultaneous measurment with conventional fluorescent spectroscopy. Using synchronous-derivative fluorimetry, the fluorescence spectra of carbaryl and carbofuran and the effect of different pH on the pesticides were studied. with pH 7.8, and Δλ=60 nm, synchronous fluorescence scan of the mixed solution in the wavelength range of 250-450 nm, was carried out, and transformed to first order derivative fluorescence spectrum. The experiment results indicate that their synchronous-derivative fluorescence spectra were separated absolutely, eliminating the disturbance between them;the fixed solution can be measured simultaneity. For carbaryl and carbofuran, the linear range is 0.013-1.156 μg·mL^-1 and 0.025-1.042 μg·mL^-1, the detection limit is 0.013 μg·mL^-1 and 0.025 μg·mL^-1, and the average recovery is 98%-104% and 96%-103%, respectively. The relative standard deviations (RSDs) of them are all under 2.25%.
		2006 Vol. 26 (11): 2085-2088 [Abstract] ( 310 ) PDF (391 KB) ( 422 )

	2089	Study of Protein Conformation in Solution by Tyrosine Residues RRS Spectrum
		ZHANG Yuan, LIN Zhe-xuan, LI Hui,LUO Wen-hong^*
		Due to the interference caused by the emission of tryptophan residue, it is hard to use fluorospectrophotometry to detect the spectrometric changes of the tyrosine residue when protein conformation is changed. When the concentration of protein in solution is relatively high, tyrosine residue has a characteristic scattering peak when excited with its K-band wavelength of light. In the present study, the authors established a method for detecting protein conformation changes in solution through the changes (peak height and wavelength shift) of the characteristic scattering peak of tyrosine residue. The method may be used for detecting protein conformation changes in solution caused by the changes of electrolyte, pH, and temperature.
		2006 Vol. 26 (11): 2089-2092 [Abstract] ( 1697 ) PDF (531 KB) ( 392 )

	2093	Study on the Mechanism of Energy Transfer between Acridine Orange and Rhodamine 6G in Micelles of Dodecyl Benzene Sodium Sulfonate
		LIU Bao-sheng, SUN Hua-yang, LIU Zhi-chao, GUO Yuan
		Applying Förster theory, the energy transfer between acridine orange (AO) and rhodamine 6G (R6G) was investigtaed. It was found that in the solution of dodecyl benzene sulfonic acid sodium (DBS), effective energy transfer can occur between AO and rhodamine 6G even when the concentration of the dyes is very low. The mechanism of energy transfer between AO and rhodamine 6G was studied. When the energy transfer occurs, the fluorescence of AO is quenched, the type of quenching is static. Based on the mechanism of Frster energy transference, the thermodynamic parameters, enthalpy change (ΔH) and entropy change (ΔS), were calculated according to Van’t Hoff equation, which indicates the acting force between AO and R6G. The transfer efficiency of energy and the distance between AO and R6G were found. It is indicated that the course of action is single static quenching.
		2006 Vol. 26 (11): 2093-2096 [Abstract] ( 1533 ) PDF (471 KB) ( 396 )

	2097	Studies on the Thermodynamics and Mechanism of Combination Reaction of Titan Yellow with Bovine Serum Albumin
		BI Xin-ying，CHI Yan-hua^*
		The characteristics of the binding reaction of titan yellow(TY) with bovine serum albumin(BSA) were studies by fluorescence and ultraviolet-visible absorption spectra. It was shown that TY has a powerful ability to quench the fluorescence intensity of BSA. The fluorescence quenching data were analyzed according to Stern-Volmer equation and Line weaver-Burk equation and the binding constant, and thermodynamic parameters were obtained. According to the thermodynamic parameters the main sorts of binding force were determined. The binding distance and energy transfer efficiency between the donor (BSA) and the acceptor (TY) were obtained by Frster’s non-radiative energy transfer mechanism. It is confirmed that the combination reaction of TY with BSA is a single static quenching process, and their interaction may be interpreted with energy transfer mechanism.
		2006 Vol. 26 (11): 2097-2100 [Abstract] ( 1142 ) PDF (493 KB) ( 391 )

	2101	Volume Chemistry-Ultraviolet Spectrum Differential Method for Determining the Oxygen Content in Anti-Corrosion Copper Powder with Surface Film Consisting of Benzotriazole
		ZHANG Tai-ming, DING Feng, LIANG Yi-zeng
		A method for determining the oxygen content in anti-corrosion copper powder with benzotriazole inhibitor surface film was established and the ultraviolet spectra of benzotriazole under various conditions were studied. The maximum absorption was at λ_max=273 nm, and the temperature did not influence the absorption intensity at normal temperature. The linear range of concentration was 0 -2.2 μg ·mL^-1, the detection limit was 0.02 μg·mL^-1, and the apparent mo1ar absorptivity of benzotriazole was ε=5.41×10⁴ L·mo1^-1·cm^-1 at 273 nm. Because the anti-corrosion copper powder consisted of copper metal, copper oxide and benzotriazole protecting film, the Cu and BTA contents of the powder were determined through EDTA titration and ultraviolet spectrophotometry, respectively, after the samples were decomposed with HCl and H2O₂, and the oxygen content of the powder was calculated by differential method. The instruments are simple, the method is economical, and the manipulation is convenient. The standard deviation is 1.7%, and the differentiation coefficient is 7.6%. In conjunction with the application of the national standard method, the oxygen contents before and after the formation of the protecting film of the electrolyte copper powder were comparatively analyzed with satisfactory results.
		2006 Vol. 26 (11): 2101-2104 [Abstract] ( 385 ) PDF (502 KB) ( 404 )

	2105	Analysis of Chromaticity and Spectral Properties of Car Solar Films
		OUYANG Yan-dong, HUANG Chong
		Chromaticity and spectral properties of the ordinary car solar films of a certain brand in the market were qualitatively measured and analyzed with WGS-9 chromaticity analysis system, UV-Vis 8500 double-beam ultraviolet/visible spectrometer and WGD-4A grating spectrometer. The result shows that getting low infrared/ ultraviolet transmissivity and high visible light transmissivity at the same time is impossible, so only one aspect can be fulfilled when we choose solar films. Solar films with main wavelength 587.3 nm (Cambridge blue) and 522.1 nm (diamond green) should be chosen if we want to get high visible light transmissivity and low ultraviolet transmissivity. Solar films with main wavelength 497.3 nm (diamond blue) and 507 nm (emerald green) should be chosen if the authors want to get high visible light transmissivity and heat insulation function.
		2006 Vol. 26 (11): 2105-2109 [Abstract] ( 2252 ) PDF (828 KB) ( 396 )

	2110	Simultaneous Determination of Phenol and Resorcinol by Dual-Wavelength Spectrophotometric Linear Regression Method
		ZHANG Qun¹,ZHAN Feng²,KAI Xiao-ming^1*
		Spectrophotometric simultaneous determination of phenol and resorcinol was studied. The absorption spectra of these two components severely overlap in ultraviolet spectral range. In the wavelength range of 250-290 nm, the absorbances of phenol and resorcinol were measured with an internal of 0.5 nm. Two wavelengths at 280.5 and 273.5 nm were chosen for the determination. Dual-wavelength linear regression method was used for the determination of phenol and resorcinol. Twenty five mixture standard solutions were prepared according to the orthogonal projection form L₂₅(5⁶). Two kinds of the components were linearly regressed. Meanwhile the contents of phenol and resorcinol in six synthetic mixture samples and simulation pharmaceutical preparations were measured. The measurement results showed that the relative error of phenol and resorcinol were less than 5%. The measurement system is stable and reliable. Therefore, the dual-wavelength spectrophotometric linear regression method may provide a new approach to the determintion of phenol and resorcinol in their compound preparations.
		2006 Vol. 26 (11): 2110-2112 [Abstract] ( 724 ) PDF (295 KB) ( 418 )

	2113	Rhodamine 6G Association Particle Based Spectrophotometric Determination of Hydroxy Free Radical and Its Application to the Selection of Antioxidant
		LIANG Ai-hui¹, JIANG Zhi-liang^1*, ZHOU Su-mei², ZHOU Yu-chan², LIANG Yue-yuan², CHEN Li-yu²
		In HCl-NaAc buffer solution, the hydroxy free radical from the Fenton reaction is captured by excess KI and releases I^-₃. The I^-₃ combines with Rhodamine B(RhB, λ_max=554 nm), Rhodamine 6G(Rh6G, λ_max=526 nm), Rhodamine S(RhS, λ_max=526 nm), and butyl Rhodamine B(b-RhB, λ_max=556 nm) to form association particles, so the absorbance at max wavelength decreases. The concentration of hydroxy free radical (calculated by the concentration of hydrogen peroxide) is proportional to the decreased absorbance of the systems of RhB, Rh6G, RhS, b-RhB in the range of 0.136-0.680 μg·mL^-1, 0.034-0.680 μg·mL^-1, 0.034-0.680 μg·mL-1, 0.034-0.680 μg·mL^-1, respectively. Based on this fact, a new method for the determination of scavenging percentage of hydroxy free radical with antioxidant was developed. The resistance to oxidation of four substances and six kinds of tea extract were measured with satisfactory results.
		2006 Vol. 26 (11): 2113-2115 [Abstract] ( 1758 ) PDF (405 KB) ( 428 )

	2116	Experiment on Optical Radiation Characteristic of Low Temperature Plasma at Atmospheric Pressure
		REN Qing-lei, LIN Qi^*
		The experiment on the optical radiation performance of a low temperature plasma due to atmospheric pressure glow discharge (APGD) in air was carried out in the present paper. A set of APGD devices were created successfully and a thin layer of plasma can be produced on the planar surface of designed electrode plate. The measurement was carried out on the optical radiation characteristic of the plasma with a grating spectrograph system. The investigation was made to several different electrode plates. The radiation spectra of several electrode plates with different power loaded were acquired. The data obtained show that the APGD optical radiation intensity grows linearly with the applied power, and increases with the static capacitance of the electrode plate. The study proves that it is feasible to control APGD plasma quantitatively and effectively by using the obtained relationship.
		2006 Vol. 26 (11): 2116-2119 [Abstract] ( 1149 ) PDF (518 KB) ( 393 )

	2120	Determination of Fifty-Five Elements in Lung Carcinomatous Tissues and Their Pericarcinomatous Tissues by Atomic Spectrometry
		XIONG Yi-jie¹, OUYANG Li^{1, 2}, LIU Ya-qiong^{1, 2}, XIE Qing^{1, 2}, LIU Hu-sheng¹, WANG Jing-yu^{1, 2*}
		A method for determining 55 elements in human lung tissue was developed. Mixed acid (HNO₃∶HClO₄) was added into samples, which were digested at room temperature over night, then heated at 180 ℃. Arsenic and selenium in lung tissue were determined by hydride generation atomic fluorescence spectrometry (HG-AFS), potassium, sodium, calcium and magnesium were determined by atomic absorption spectrometer (AAS), while the rest of forty-eight elements were determined by inductively coupled plasma mass spectrometry (ICP-MS), respectively. Reference materials of GBW(E)080193 bovine hepar and GBW09101 human hair were analyzed by the described method. The measured element values in two reference materials accorded with their reference values. The recovery rates for most of the studied elements were 90%-110％. The precisions of the method were 1.7％-10.0％. The concentrations of seventeen elements in the carcinomatous tissues were remarkably different from those in the pericarcinomatous tissues. The method is rapid, simple and accurate.
		2006 Vol. 26 (11): 2120-2124 [Abstract] ( 1077 ) PDF (545 KB) ( 409 )

	2125	Study of Inorganic Elements in Silybum Marianum: Distribution and Extraction Rate
		CAI Xiu-lan, CHEN Yi-jun, DAI Le-mei, LIAN Hong-zhen^*
		The contents of multiple inorganic elements in silybum marianum products in different processing stages, including dry fruit, seedcake and extracts, were simultaneously measured by inductively coupled plasma atom emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS). The results indicated that the contents of the elements are the highest in the seedcake and the lowest in the extracts. Moreover, the different decoctions of Silybum marianum fruit made for different immersion times were determined. It was demonstrated that most of the elements measured are soluble, and the total content extracted for the first four immersion times is much higher than that for the latter three times. The certificate reference tea (GBW070605) was analyzed by this method, and the analysis results of most elements in the reference tea were in agreement with the certified values.
		2006 Vol. 26 (11): 2125-2129 [Abstract] ( 246 ) PDF (557 KB) ( 418 )

	2130	*Determination of Inorganic Elements in Elsholtzia bodinieri* Vaniot from Gansu by Microwave Digestion ICP-AES**
		HU Hao-bin^1*, CAO Hong², LIU Jian-xin³, ZHENG Xu-dong¹
		In the present paper, orthogonal test and square error analysis were applied to the determination of inorganic elements in the aerial part of E. bodinieri V. such as K, Na, Ca, Ba, Pb, Zn, Mn, Cu, Mg, Fe and Al by microwave digestion ICP-AES technique. The method is simple, rapid, and features of high sensitivity, good accuracy and simultaneous determination of many elements. Its recovery ratio obtained by standard addition method ranged from 93.2% to 104.1%, and its RSD (n=5) was lower than 3.20%. The results showed that this plant has rich inorganic elements, which are essential to human health. The result provides a theoretical basis for investigating the correlation of element content and the effect of medicine in E. bodinieri V.
		2006 Vol. 26 (11): 2130-2133 [Abstract] ( 623 ) PDF (423 KB) ( 459 )

	2134	Determination of Trace Elements in Mongolian Medicine Gardi-13 by ICP-AES with Microware Digestion
		E Er-deng-sang¹, BAO Yin-da-lai², Na Ren-ge-rile²
		In the study of Mongolian medicine the authors found that the Mongolian medicine contains large amount trace elements, and is particularly rich in human-body-needed trace elements, but heavy metals are very little. A method for the determination of Ca, Cu, Zn, Fe, Mg, Mn and Pb in Mongolian medicine Gardi-13(1^#, 2^#, 3^#) by ICP-AES with microwave digestion was studied. The recoveries of standard addition are in the range of 97.5%-105.5%. The relative standard deviation is ≤2.90, and the detection limit is smaller than ≤0.009 μg·L^-1. The results show that 1^#, 2^# and 3^# are some different, and the smell and function have some relation with trace elements. The authors can control the accuracy of preparation dosage and guarantee the quality of products by determining the trace elements.
		2006 Vol. 26 (11): 2134-2136 [Abstract] ( 1529 ) PDF (426 KB) ( 398 )

	2137	*Study on the Determination of Cd and Pb in Radix Salviae Miltiorrhizae* by ICP-AES**
		ZHAO Ai-hong, WANG Jian-hua^*, SONG Zhi-gang, FAN Guang-hua, LIU Chun-xiao
		In the present paper, a method was developed for the determination of Cd and Pb by ICP-AES. The effects of two different sample treatment methods, including wet digestion method and dry ash method, were compared. The contents of Cd and Pb in Danshen (Radix Salviae miltiorrhizae) grown in some areas of Shandong were determined. The results show that it is satisfactory to apply ICP-AES to the determination of Cd and Pb with the detection limits (DL) of 1.92 ng·mL^-1 and 1.07 ng·mL^-1, the precision values (RSD) of 3.14% and 1.83%, and the recovery rates of 103.0% and 96.2% respectively. The wet digestion method is better than the dry ash method for its lower RSD and higher recovery rate. The dry ash method is suitable for the determination of Pb, but not suitable for the determination of Cd due to its low recovery rate. The results also show that the contents of Cd and Pb in Danshen are lower than the standard of Chinese Pharmacopoeia (2005), which meets the standard of GAP production.
		2006 Vol. 26 (11): 2137-2139 [Abstract] ( 451 ) PDF (401 KB) ( 413 )

	2140	Determination of Nutrient Elements in Jerusalem Artichoke (J.A) Irrigated by Various Concentrations of Seawater by AAS
		YANG Hong-ze,WANG Chang-hai^*,YUAN wen-jie
		The present study was carried out on the determination of trace elements in J.A by AAS, which has been irrigated by various concentrations of seawater and harvested in different years. The method is rapid with good precision and accuracy. Correlation coefficients were 0.997 1-0.999 7. The result suggests that J.A is rich in K, Mg and Na, specially the ratio of K to Na is very high, and the content order is K＞Mg＞Na＞Fe＞Ni＞Zn＞Cu＞Mn with Pb, Cr and Cd being lower. In addition, some trace elements are different in various J.A. So the authors conclude that the concentration of seawater has effect on trace elements. Perhaps the method is worth much more utilization.
		2006 Vol. 26 (11): 2140-2142 [Abstract] ( 1718 ) PDF (334 KB) ( 388 )

	2143	The Influence of Oxy-Organics on the Emission Intensity of Flame Atomic Emission Spectrometry(FAES) of Alkali Metals
		YANG Heng-rui,YAO Shu-xin^*
		Flame atomic emission spectrometry(FAES) is frequently used to analyze various alkaline elements. The effects of concentrated oxy-organics in water solution on the radiation intensity of alkaline elements FAES were studied. The species and concentration of oxy-organics may affect the radiation intensity variation amplitude of alkaline elements and also the tendency of the mutation can be different dramatically. Similarly, the emission intensity of alkaline elements can be affected by isomers or variation of the quantity of functional group, and the trend is different either.
		2006 Vol. 26 (11): 2143-2146 [Abstract] ( 1184 ) PDF (368 KB) ( 395 )

	2147	GFAAS Determination of Trace Amount Cadmium in Shark Liver after Microwave Digestion
		WENG Di
		In the present work, a method was developed for the determination of cadmium in shark liver by means of graphite furnace atomic absorption spectrometry with microwave digestion, and a systematic study was carried out by selection of the most appropriate working conditions and optimization of the sample mass. The samples were digested by microwave with mixed acid of HF-HCIO₄(1∶2). Trace amount cadmium was determined by graphite furnace atomic absorption spectrometry(GFAAS) with Pd(NO₃)₂ as a matrix modifier. If appropriate working conditions are chosen, the method finally proposed shows interesting features for the determination of the analyte in the samples such as: suitable precision values. To assure the analytical quality, porcine liver GBW 08551 was used as a standard reference material. The measured values were in a good agreement with the certified ones within the analytical error of ±10%. The method is simple and rapid with accurate results.
		2006 Vol. 26 (11): 2147-2149 [Abstract] ( 1142 ) PDF (411 KB) ( 427 )

	2150	Study on the Determination and Blurred Classification of Metal Elements Content in Danshen etc 11 Kinds of Chinese Traditional Medicine
		DONG Shun-fu¹,LIU Jie²,DONG Hong-bo¹,ZHANG Wei-ping¹,LIU Jian-hua¹
		The contents of potassium, calcium, magnesium, iron, manganese, copper, zinc and chromium in 11 kinds of Chinese traditional medicines such as Danshen, Gouqizi, Dangshen, Jiaogulan, Dongchongxiacao, Huangqi, Rougui, Xixin, Longdancao, Shanzhuyu and Duzhong were determind by flame atomic absorption spectrophotometry, in order to study the interrelation between metal elements and the therapeutic effect through the method of blurred classification. The results showed that the cluster in 7 kinds of medicines was similar when the relative coefficent was 0.50;cluster in 3 kinds of medicines was similar when the relative coefficent was 0.65;the cluster in 2 kinds of medicines was similar when the relative coefficent was 0.75. When the contents of metal elements are rich and the relative coefficient is considerably great, their therapeutic effect is similar. This suggests that trace elements have much to do with the therapeutic effect. The study provides new useful data for research on new types of medicines, and developing a new method for evaluating quality of Chinese tradition medicines.
		2006 Vol. 26 (11): 2150-2153 [Abstract] ( 1688 ) PDF (481 KB) ( 429 )

	2154	Analysis of Trace Elements and Macro Elements in Jin He Nao Xue Kang Capsules
		KU Jin-liang¹,JI Shou-xiang², MA Cun-hua², GAO Jin-hong²
		Ten trace elements and macro elements in Jin He Nao Xue Kang capsules, such as Cd, Co, Cr, Cu, Fe, Mg, Mn, Ni, Pb, and Zn were determined by flame atomic absorption spectrophotometry. The results showed that there are comparatively rich macro element Mg, and profitable elements such as trace elements Cu, Zn, Fe, Mn, Ni etc in Jin He Nao Xue Kang capsules. The contents of poisonous elements (Cd and Pb) are comparatively low. The content sequence of metal elements is as follow：Fe＞Mg＞Zn＞Mn＞Cu＞Ni＞Cr＞Pb＞Co＞Cd. It provided useful data for discussing the relationship between trace elements and macro elements in Tibetan traditional medicine, and the cure for vascular and cerebral vascular disease.
		2006 Vol. 26 (11): 2154-2156 [Abstract] ( 2292 ) PDF (405 KB) ( 441 )

	2157	Determination of Calcium in Calcium Citrate and Calcium Malate by X-Ray Fluorescence Spectrum
		XIONG Min
		Sample was pressed into a thin piece by a press machine. Sequential single channel X-ray fluoresence spectrum was used to determine the calcium content in calcium citrate and calcium malate. The whole process of sample preperation and determination takes only 10 minutes. In the present paper the determination of the calcium content in calcium citrate and calcium malate was studied. The result was compared with that of FAAS. The characteristics of the two methods were described respectively.
		2006 Vol. 26 (11): 2157-2158 [Abstract] ( 1169 ) PDF (274 KB) ( 470 )

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