Study on Different Digestion Methods for Determination of Twelve Metal Elements in the Plant Platycodon Grandiflorum (Jacq.) A. DC.by FAAS
XUE Guo-qing1,HAN Yu-qi1,SONG Hai1,DI Duo-long2
1. Department of Chemistry, Key Laboratory of Resources and Environment Chemistry of West China, Hexi University, Zhangye 734000, China 2. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000，China
Abstract：In the present paper the effects of different digestion methods on determining the amount of metal elements in the plant platycodon grandiflorum (Jacq.) A. DC. by flame atomic absorption spectrophotometry(FAAS) are reported. FAAS method was established for the determination of K, Mg, Ca, Cu, Zn, Mn, Fe, Co, Ni, Cd and Cr and Pb in the plant platycodon grandiflorum (Jacq.) A. DC. The samples were incinerated and followed by digestion with HNO3-HClO4(φ,4∶1) at 90-95 ℃ and normal pressure. In the meantime, the optimum parameters of FAAS and effects of solution medium on the results were discussed. The analytical results of K, Mg, Ca, Mn, Fe, Cu and Zn were 13 226.32, 922.57, 1 710.72, 9.23, 336.66, 8.75 and 19.62 μg·g-1 respectively, while Co, Ni, Cd, Cr and Pb were not checked out in the samples. The results showed that the recovery of standard addition was 95.45%～105.50% and the relative standard deviation (n=9) was 0.34%～5.78%. The method is quick, simple and convenient, and the results are satisfactory.
Key words：FAAS;Plant platycodon grandiflorum (Jacq.) A. DC.;Metal element
薛国庆1,韩玉琦1,宋海1,邸多隆2. FAAS法测定不同消化方法栽培桔梗中12种金属元素含量的研究[J]. 光谱学与光谱分析, 2007, 27(06): 1231-1234.
XUE Guo-qing1,HAN Yu-qi1,SONG Hai1,DI Duo-long2. Study on Different Digestion Methods for Determination of Twelve Metal Elements in the Plant Platycodon Grandiflorum (Jacq.) A. DC.by FAAS. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(06): 1231-1234.
[1] WANG Kui, CI Yun-xiang, TANG Ren-huan, et al(王 夔, 慈云祥, 唐任寰, 等). Handbook of the Trace Element in Life Science Analysis and Data(生命科学中的微量元素分析与数据手册). Beijing: China Measure Press(北京：中国计量出版社)，1998. 7. [2] Lippard S J, Berg J M. Translated by XI Zhen-feng, YAO Guang-qing, XIANG Si-fen, et al(Lippard S J, Berg J M著;席振峰，姚光庆，项斯芬，等译). Principles of Bioinorganic Chemistry(生物无机化学原理). Beijing: Peking University Press(北京：北京大学出版社)，2000. 2. [3] WANG Xiao-yi, Zhu W, Witkamp G T, et al(王小逸，Zhu W, Witkamp G T, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2003, 23(6): 1167. [4] XUE Guo-qing, LIU Qing, REN Xue-feng, et al(薛国庆，刘 青，任雪峰，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2004, 24(11): 1461. [5] XUE Guo-qing, LIU Qing, HAN Yu-qi，et al(薛国庆，刘 青，韩玉琦，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2006, 26(10): 1935. [6] The Pharmacopoeia Committee of the People’s Republic of China(国家药典委员会). China Pharmacopoeia(中国药典) (2000, Vol. Ⅰ). Beijing: Chemical Industral Press(北京: 化学工业出版社), 2000. 225.
