Abstract：Each state of cysteine and zinc ion in aqueous solution at different pH conditions was calculated by computer, giving out the distribution curve. The mechanism of complexing action in indirectly determining cysteine by flame atomic absorption spectrometry with ZnS, and the influence of solution pH were studied. The state of cysteine and zinc ion in aqueous solution at different pH is different. The reason for forming the peak is the change of concentration of cysteine and zinc ion at different pH. The soluble complexing ion is composed of -1 valence cysteine Cys- and Zn(OH)2. The theoretical analysis is well conformable with the data determined from the experiments. The structure of complexing ion is ２Zn(OH)２.
刘文涵，单胜艳，张 丹，吴小琼. 原子吸收硫化锌法间接测定半胱氨酸络合反应的机理研究[J]. 光谱学与光谱分析, 2005, 25(10): 1717-1719.
LIU Wen-han, SHAN Shen-yan, ZHANG Dan, WU Xiao-qiong. Studies of Complexing Action Mechanism in Indirect Determination of Cysteine by FAAS with ZnS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(10): 1717-1719.
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