Speciation of Arsenic in Natural Waters by Solvent Extraction and Hydride Generation Atomic Absorption Spectrometry
Speciation of Arsenic in Natural Waters by Solvent Extraction and Hydride Generation Atomic Absorption Spectrometry
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通过溶剂萃取和氢化物发生原子吸收光谱法分析天然水中的砷形态
DOI：
10.1021/ac00091a039
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发表时间：
1994
影响因子：
7.4
通讯作者：
M. Kawashima
中科院分区：
文献类型：
--
作者：
H. Hasegawa;Y. Sohrin;M. Matsui;M. Hojo;M. Kawashima
本文介绍了一种新的方法用于天然沃茨中砷形态的分析。用二乙基二硫代氨基甲酸二乙铵（DDDC）萃取分离五价砷中的三价砷（As（III））、一甲基亚胂酸（MMAA（III））和二甲基亚胂酸（DMAA（III）），经冷捕集和色谱分离后，用氢化物发生原子吸收光谱法（HG-AAS）测定。三价物质的检测限约为13-17 pM。三价和五价物质的浓度总和通过HG-AAS在相同样品的等分试样中直接测定。这是首次在天然沃茨中发现并测定三价甲基砷化合物
A new approach is described for the speciation of arsenic species including trivalent methylarsenicals in natural waters. Arsenious acid [As(III)]; monomethylarsonous acid [MMAA(III)], and dimethylarsinous acid [DMAA(III)] are separated from pentavalent species by solvent extraction using diethylammonium diethyldithiocarbamate (DDDC) and determined by hydride generation atomic absorption spectrometry (HG-AAS) after cold trapping and chromatographic separation. The detection limits for the trivalent species are about 13-17 pM. The sum of concentrations of the trivalent and pentavalent species are determined directly by HG-AAS in aliquots of the same samples. This is the first report of trivalent methylarsenicals being found and measured in natural waters