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Evaluation of Several Field Test Kits for Determining Concentrations of Arsenic in Drinking Water 几种测定饮用水中砷浓度的现场测试试剂盒的评价
发布日期: 2004-11-15
对几种商用砷现场测试试剂盒的性能进行了评估 评估并与标准石墨炉原子吸收法进行比较 分光光度法(GFAA)。性能取决于精度、准确度、, 线性、操作员偏差、矩阵效应和“易用性”。精密度和准确度都很高 测定砷III、砷V和多种化合物的含量。精确性是 根据标准偏差确定,对所有测试试剂盒来说都相对较好。但准确度, 通过回收率百分比计算,不同试剂盒的回收率差异很大。三个测试包 回收率大于75%。 然而,其他四个测试试剂盒 按照作者的定义,回收率很低(50%至66%)。基质效应 使用试剂中已知的硫化物和锑干扰物进行评估 水现场样品也在不同浓度下进行测试,以确定性能 在现场测试套件的整个工作范围内,定义为线性。所有野战装备 他们相对没有操作员偏见。四个测试试剂盒被确定为相对稳定 易于使用,或具有较高的“易用性”分数。其中两个现场测试套件符合所有要求 遵循以下标准;易于使用,无操作员偏差,价格低廉,准确和精确。 包括12个参考文献、表格和图表。
The performance of several commercially available field test kits for arsenic was evaluated and compared to standard graphite furnace atomic absorption spectrophotometry (GFAA). Performance was determined by precision, accuracy, linearity, operator bias, matrix effects and "ease of use". Precision and accuracy were determined for arsenic III, arsenic V, and a combination of species. Precision was relatively good for all test kits as determined by standard deviation. Accuracy however, calculated through percent recoveries, varied greatly among test kits. Three test kits produced percent recoveries of greater than 75%. However, the other four test kits produced poor percent recoveries as defined by the authors (50 to 66%). Matrix effects were evaluated using additions of known interferences of sulfide and antimony in reagent water. Field samples were also tested at various concentrations to determine performance throughout the working range of the field test kits, defined as linearity. All field kits were relatively free from operator bias. Four test kits were determined to be relatively easy to use, or have a high "ease of use" score. Two of the field test kits met all the following criteria; easy to use, no operator bias, inexpensive, accurate and precise. Includes 12 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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