Evaluation of an arsenic test kit for rapid well screening in Bangladesh.

Evaluation of an arsenic test kit for rapid well screening in Bangladesh.
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DOI:
10.1021/es300253p
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发表时间:
2012-10-16
影响因子:
11.4
通讯作者:
van Geen, Alexander
van Geen, Alexander
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
George, Christine Marie;Zheng, Yan;Graziano, Joseph H.;Bin Rasul, Shahriar;Hossain, Zakir;Mey, Jacob L.;van Geen, Alexander

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在孟加拉国,数以百万计的村民通过饮用而暴露于地下水中的砷仍然有增无减。自近10年前使用测试工具进行全面测试以来,已经安装了数百万口新井,但尚未进行测试,因此需要负担得起的测试。通过对孟加拉国的123口井进行盲测,并与实验室测量结果进行比较,评估了砷经济快速(EQ)试剂盒的性能;65口井进行了两次测试。同样的123口井的一部分也在现场使用了Hach EZ试剂盒,在孟加拉国的实验室使用了Digital Arsenator。EQ试剂盒对123口井中110口(89%)和113口(92%)的检测结果分别符合WHO标准(10 μg/L)和孟加拉国标准(50 μg/L)。与世界卫生组织的指导方针相比,所有的错误分类都是对含砷量在10 ~ 27 μg/L之间的井的低估。相对于孟加拉国的标准,高估和低估是均匀分布的。与Hach EZ相比,EQ设备的反应时间只有10分钟,与Arsenator相比成本更低,因此EQ设备在孟加拉国和其他地区的试井中似乎具有一些优势。
Exposure to arsenic in groundwater via drinking remains unabated for millions of villagers in Bangladesh. Since a blanket testing campaign using test kits almost a decade ago, millions of new wells have been installed but not tested, thus affordable testing is needed. The performance of the Arsenic Econo-Quick (EQ) kit was evaluated by blindly testing 123 wells in Bangladesh and comparing with laboratory measurements; 65 wells were tested twice. A subset of the same 123 wells was also tested using the Hach EZ kit in the field and the Digital Arsenator in the laboratory in Bangladesh. The EQ kit correctly determined the status of 110 (89%) and 113 (92%) out of 123 wells relative to the WHO guideline (10 μg/L) and the Bangladesh standard (50 μg/L), respectively. Relative to the WHO guideline, all misclassifications were underestimates for wells containing between >10 and 27 μg/L As. Relative to the Bangladesh As standard, over- and under-estimates were evenly distributed. Given its short reaction time of 10 min relative to the Hach EZ and its lower cost compared to the Arsenator, the EQ kit appears to have several advantages for well testing in Bangladesh and elsewhere.
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发表时间: 2012-02-21
期刊: Environmental health : a global access science source
影响因子: --
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