The development and use of an innovative laboratory method for measuring arsenic in drinking water from western Bangladesh.
The development and use of an innovative laboratory method for measuring arsenic in drinking water from western Bangladesh.
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DOI：
10.1289/ehp.7974
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发表时间：
2005-09
影响因子：
10.4
通讯作者：
Sarkar B
中科院分区：
文献类型：
--
作者：
Frisbie SH;Mitchell EJ;Yusuf AZ;Siddiq MY;Sanchez RE;Ortega R;Maynard DM;Sarkar B
孟加拉国所有大约1000万口饮用水井都必须定期进行砷检测。这项任务的规模和孟加拉国有限的资源导致使用低成本、半定量的现场工具包，将砷测量到相对较高的50 μg/L国家饮用水标准。然而，迫切需要用一种廉价的实验室方法来补充并最终取代这些现场工具包，这种方法可以根据世界卫生组织（世卫组织）基于健康的饮用水准则测量更具保护作用的10 μg/L。不幸的是，孟加拉国获得原子吸收光谱仪或其他昂贵仪器的机会有限，无法测量到卫生组织10 μg/L的指导值。为了满足这一需求，开发了一种廉价和高灵敏度的实验室测量砷的方法。这种新方法是唯一准确、精确和安全的方法来定量< 10 μg/L的砷，而不需要昂贵或高度专业化的实验室设备。在该方法中，砷通过还原为砷气体从样品中去除，通过氧化为砷酸在吸收剂中收集，通过与钼酸砷的顺序反应显色，并通过分光光度法定量。我们将该方法与二乙基二硫代氨基甲酸银[AgSCSN(CH2CH3)2]和石墨炉原子吸收光谱法（GFAAS）进行了比较。我们的方法比AgSCSN(CH2CH3)2方法更准确，更精确，更环保，比GFAAS更准确，更经济。最后，这项研究表明，孟加拉国人愿意与邻居共享饮用水，以满足世卫组织10 μg/L的更有保护作用的指导方针。
All of Bangladesh’s approximately 10 million drinking-water tube wells must be periodically tested for arsenic. The magnitude of this task and the limited resources of Bangladesh have led to the use of low-cost, semiquantitative field kits that measure As to a relatively high 50 μg/L national drinking water standard. However, there is an urgent need to supplement and ultimately replace these field kits with an inexpensive laboratory method that can measure As to the more protective 10 μg/L World Health Organization (WHO) health-based drinking water guideline. Unfortunately, Bangladesh has limited access to atomic absorption spectrometers or other expensive instruments that can measure As to the WHO guideline of 10 μg/L. In response to this need, an inexpensive and highly sensitive laboratory method for measuring As has been developed. This new method is the only accurate, precise, and safe way to quantify As < 10 μg/L without expensive or highly specialized laboratory equipment. In this method, As is removed from the sample by reduction to arsine gas, collected in an absorber by oxidation to arsenic acid, colorized by a sequential reaction to arsenomolybdate, and quantified by spectrophotometry. We compared this method with the silver diethyldithiocarbamate [AgSCSN(CH2CH3)2] and graphite furnace atomic absorption spectroscopy (GFAAS) methods for measuring As. Our method is more accurate, precise, and environmentally safe than the AgSCSN(CH2CH3)2 method, and it is more accurate and affordable than GFAAS. Finally, this study suggests that Bangladeshis will readily share drinking water with their neighbors to meet the more protective WHO guideline for As of 10 μg/L.
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影响因子：
10.4
作者：
Morales, KH;Ryan, L;Chen, CJ
通讯作者：
Chen, CJ
影响因子：
4.2
作者：
Milton, R.;Duffield, W. D.
通讯作者：
Duffield, W. D.
影响因子：
8.8
作者：
Ng, JC;Wang, JP;Shraim, A
通讯作者：
Shraim, A
影响因子：
10.4
作者：
Frisbie, Seth H;Ortega, Richard;Maynard, Donald M;Sarkar, Bibudhendra
通讯作者：
Sarkar, Bibudhendra