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Updated: Aug 11, 2026

Atomic Absorbance Spectroscopy to Measure Intracellular Zinc Pools in Mammalian Cells
Published on: May 16, 2019
[Determination of stability constant of zinc cysteinate by indirect determination using FAAS with ZnS]
Wen-han Liu1, Sheng-yan Shan, Dan Zhang
1State Key Laboratory, Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China.
Abstract:
On the bases of exploring measurement mechanism and complex compound components of indirect determination of cysteine acid by flame atomic absorption spectrometry with zinc sulfide, the stability constants of the complex compound of zinc cysteinate were studied successfully, after the numeric measurements and theoretical investigations under the best optimized acidity for the determination. In conclusion, at the best optimized acidity pH 9.7, the stability constant of alkalescence zinc cysteinate is between 2.998 x 10(30) and 3.858 x 10(30), with the average value beta w = 3.286 x 10(30) and log beta w = 30.517, and the standard deviation is 0.315 x 10(30). While the stability constant of zinc cysteinate is between 7.853 x 10(21) and 1.011 x 10(22), with the average value beta w = 8.607 x 10(21) and log beta w = 21.935, and the standard deviation is 0.315 x 10(21). It is shown that the atomic absorption spectrometry can not only be used for the determination of trace elements and the indirect determination of organic compound, but also can carry out the study of physical configuration and the determination of physical constant of complex ion.
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