Letter: Limited accuracy of arsenic field test kit

Evaluation of arsenic field test kits for drinking water analysis

Comment on "Reliability of a commercial kit to test groundwater for arsenic in Bangladesh".

In a recent publication, “Reliability of a commercial kit to test groundwater for arsenic in Bangladesh” (1) regarding the effectiveness of the Hach EZ arsenic kit (product 2822800), Van Geen et al. remarked “Clearly the Hach kit should continue to be used to test wells throughout Bangladesh and other countries affected by elevated arsenic in groundwater”. They studied only 799 wells in a 25-sq...

Reliability of a commercial kit to test groundwater for arsenic in Bangladesh.

A comparison of field and laboratory measurements of arsenic in groundwater of Araihazar, Bangladesh, indicates that the most widely used field kit correctly determined the status of 88% of 799 wells relative to the local standard of 50 microg/L As. Additional tests showthatthe inconsistencies, mainly underestimates in the 50-100 microg/L As range, can be avoided by increasing the reaction time...

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

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 ...

Reliability of the Hach kit to test groundwater for arsenic in

A comparison of field and laboratory measurements of arsenic in groundwater of Araihazar, Bangladesh, indicates that the most widely-used field kit correctly determined the status of 88% of 799 wells relative to the local standard of 50 µg/L As. Additional tests show that the inconsistencies, mainly underestimates in the 50-100 µg/L As range, can be avoided by increasing the reaction time from ...