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The rate of oxidation of dimethylarsinous acid to dimethylarsinic acid is pH dependent: implications for the analysis and toxicology of arsenic metabolites in urine

机译:二甲基亚砷酸氧化为二甲基亚砷酸的速率取决于pH值:对尿中砷代谢物的分析和毒理学意义

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摘要

A H-1 NMR spectroscopic study has shown the rate oxidation of dimethylarsinous acid to dimethylarsinic acid in buffered aqueous solutions to depend upon pH. Dimethylarsinous acid has been reported to be a highly toxic arsenical metabolite and component of the urine of persons exposed to inorganic arsenic, particularly through drinking water. As the pH of human urine can range from 4.5 to 8, the pH dependence of the oxidation rate of dimethylarsinous acid to dimethylarsinic acid has profound implications for the detection and analysis of these compounds in urine samples, and for the relevance of the experimental toxicology of dimethylarsinous acid.
机译:H-1 NMR光谱研究表明,在缓冲水溶液中,二甲基亚砷酸氧化为二甲基亚砷酸的速率取决于pH值。据报道,二甲基亚砷酸是剧毒的砷代谢产物,是暴露于无机砷(尤其是通过饮用水)的人尿液中的成分。由于人类尿液的pH值范围为4.5至8,因此,二甲基亚砷酸向二甲基砷酸的氧化速率的pH依赖性对尿液样品中这些化合物的检测和分析以及与苯酚的实验毒理学的相关性具有深远的意义。二甲基亚砷酸。

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