| 光谱学与光谱分析 |
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| Speciation Analysis of Eight Metal Elements in the Leaves of Alstonia Scholaris by Flame Atomic Adsorption Spectrometry |
| YE Yan-qing1, WU Na1, YANG Li-juan1, NIAN Xiao2, ZHANG Dai-yun1, GAO Yun-tao1 |
1. School of Chemistry and Biotechnology, Yunnan Nationalities University, Kunming 650031, China
2. Yunnan Xishuangbanna Institute of Food and Drug Control, Jinghong 666100, China |
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Abstract The eight elements, Cu, Zn, Fe, Mg, Ca, Cr, Mn and Cd, in the leaves of Alstonia scholaris were extracted based on traditional analytical flowchart program and separated into water-soluble state and suspension state by micro porous filtering film. The water-soluble state was divided into organic state and inorganic state based on macro porous adsorption resin. The elements were detected by flame atomic adsorption spectrometry (FAAS). The results show that the extractive rates of the elements were in the range of 9.84%-89.07%, and the immersion-residue ratio in the range of 10.96%-903.4%. Adsorption ration of suspension state was in the range of 3.44%-23.37%. The recovery ratios by standard addition were in the range of 94.5%-111.6%, and the relative standard deviations (RSD) were in the range of 0.29%-2.47%. The precision and accuracy of determining results are satisfactory.
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Received: 2008-12-02
Accepted: 2009-03-06
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Corresponding Authors:
YE Yan-qing
E-mail: yey-qing@163.com, yeyqing@21cn.com
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