Citation: WANG Min-Dai, GUO Qing-Hai, GUO Wei, PENG Yue-E, ZHAO Qian. Synthesis, Identification and Quantitative Analysis of Aqueous Thioarsenates[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(11): 1715-1720. doi: 10.11895/j.issn.0253-3820.160167
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Four kinds of thioarsenates, HnAsSO3n-3, HnAsS2O2n-3, HnAsS3On-3 and HnAsS4n-3, were synthesized and identified by electrospray ionization-high resolution mass spectrometry (ESI-HR-MS). With the synthetic thioarsenates as standards, a quantitative analytical method based on ion chromatograph-inductively coupled plasma mass spectrometry (IC-ICP-MS) was set up to simultaneously determine the concentrations of arsenite, arsenate, mono-thioarsenate, di-thioarsenate, tri-thioarsenate, and tetra-thioarsenate in water. The linear range of the method was from 3.3 μg/L to 833 μg/L with the correlation coefficients higher than 0.99, and the detection limits were between 0.4 μg/L and 25 μg/L. The synthetic standard materials of thioarsenates and the quantitative analysis method established in this study are of great significance for future investigations on the environmental transportation and transformation of various arsenic species derived from natural sulfidic waters.
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