Microsecond Pulsed Hollow Cathode Lamp as Enhanced Excitation Source of Hydride Generation Atomic Fluorescence Spectrometry
ZHANG Shuo1,2
1. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China 2. College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
Abstract：The spectral, electrical and atomic fluorescence characteristics of As, Se, Sb and Pb hollow cathode lamps (HCLs) powered by a laboratory-built high current microsecond pulse (HCMP) power supply were studied, and the feasibility of using HCMP-HCLs as the excitation source of hydride generation atomic fluorescence spectrometry (HG-AFS) was evaluated. Under the HCMP power supply mode, the As, Se, Sb, Pb HCLs can maintain stable glow discharge at frequency of 100~1 000 Hz, pulse width of 4.0～20 μs and pulse current up to 4.0 A. Relationship between the intensity of characteristic emission lines and HCMP power supply parameters, such as pulse current, power supply voltage, pulse width and frequency, was studied in detail. Compared with the conventional pulsed (CP) HCLs used in commercial AFS instruments, HCMP-HCLs have a narrower pulse width and much stronger pulse current. Under the optimized HCMP power supply parameters, the intensity of atomic emission lines of As, Se, Sb HCLs had sharp enhancement and that indicated their capacity of being a novel HG-AFS excitation source. However, the attenuation of atomic lines and enhancement of ionic lines negated such feasibility of HCMP-Pb HCL. Then the HG-AFS analytical capability of using the HCMP-As/Se/Sb HCLs excitation source was established and results showed that the HCMP-HCL is a promising excitation source for HG-AFS.
[1] Dawson J B, Ellis D J. Spectrochimica Acta Part A: Molecular Spectroscopy, 1967, 23(3): 565. [2] LIU Ming-zhong, GUO Xiao-wei, ZHANG Jin-mao(刘明钟，郭小伟，张锦茂). Chinese Journal of Analytical Chemistry(分析化学), 1988, 16(1): 34. [3] ZHANG Jin-mao, CHEN Hao, ZHANG Qin(张锦茂，陈 浩，张 勤). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1994, 14(4): 89. [4] HUANG Yue, LI Ke, ZHAO Zhi-hua, et al(黄 跃，李 可，赵志华，等). Rock and Mineral Analysis(岩矿测试), 2006, 25(4): 384. [5] Masamba W R, Smith B W, Krupa R J, et al. Applied Spectroscopy, 1988, 42(5): 872. [6] HUANG Ben-li, YANG Peng-yuan, LIN Yue-he, et al(黄本立，杨芃原，林跃河，等). Chinese Journal of Analytical Chemistry(分析化学), 1991, 19(3): 259. [7] GONG Zhen-bin, YANG Peng-yuan, LIN Yue-he, et al(弓振斌，杨芃原，林跃河，等). Chemical Journal of Chinese Universities(高等学校化学学报), 1995, 16(7): 1037. [8] GONG Zhen-bin, YANG Peng-yuan, WANG Xiao-ru, et al(弓振斌，杨芃原，王小如，等). Chemical Journal of Chinese Universities(高等学校化学学报), 1995, 16(6): 865. [9] ZHANG Shao-yu, HUANG Ben-li, GONG Zhen-bin(张绍雨，黄本立，弓振斌). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001, 21(5): 632. [10] Xie Y Z, Huang B L, Gong Z B, et al. Canadian Journal of Applied Spectroscopy, 1996, 41(6): 149. [11] GUO Zeng-hua, ZHENG Yong-zhang, MA He-ying, et al(郭增华，政永章，马贺英，等). China Patent(中国专利), 200720190141, 2007. [12] Efimova V, Hoffmann V, Eckert J. Spectrochimica Acta Part B: Atomic Spectroscopy, 2012, 76(2): 181. [13] ZHANG Shao-yu, GONG Zhen-bin, HUANG Ben-li, et al(张绍雨，弓振斌，黄本立，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 1997, 17(5): 67.
