Preservation and Field Speciation of Inorganic Arsenic Species in Groundwater
Preservation and Field Speciation of Inorganic Arsenic Species in Groundwater
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地下水中无机砷形态的保存和现场形态分析
DOI：
10.2166/wqrj.2006.013
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发表时间：
2006
影响因子：
2
通讯作者：
D. Clifford
中科院分区：
文献类型：
--
作者：
G. Samanta;D. Clifford
本研究描述了用乙二胺四乙酸（EDTA）和乙酸（HAc）保存样品的As（III）和As(V)的双重保存和现场形态形成技术的发展。新方法与现有的保存和现场物种形成方法进行了比较，结果表明，尽管样品中可能存在亚铁的干扰，但新方法是准确和精确的。在明尼苏达州、北达科他州和加利福尼亚州的55口饮用水井（18个样品，一式三份）上进一步评估了新的保存-物种形成方法，结果表明，现场物种形成测量的As（III）与随后（在1‐3 d内）保存样品的实验室物种形成一致，斜率为0.98，相关系数r2 = 0.999。保存的样品在室温（22 - 24℃）的黑暗中可以保存
This research describes the development of a dual preservation- and field-speciation technique for As(III) and As(V) speciation of a sample preserved with ethylenediaminetetraacetic acid (EDTA) and acetic acid (HAc). The new method was compared with existing preservation- and field-speciation methods and was shown to be accurate and precise in spite of possible interference from ferrous iron in the sample. The new preservation-speciation method was further evaluated on 55 drinking water wells (18 samples in triplicate) in Minnesota, North Dakota and California with the result that As(III) measured by field-speciation agreed with subsequent (within 1‐3 d) laboratory speciation on the preserved sample with a slope of 0.98 and a correlation coefficient of r 2 = 0.999. Preserved samples stored in the dark at room temperature (22‐24oC) could main