West Bengal || Bangladesh
Middle Ganga Plain, Bihar ||
FIELD TESTING KITS FOR ARSENIC: HOW EFFECTIVE ARE THE MILLION-DOLLAR PROJECTS?
Shall we use Field-kit data for taking a decision
(a) During the second week of July, 1998, while our group was working in Sonagazi, Feni, Bangladesh, it was noted that a large number of deep tubewells were sanctioned in the area, as field kit data showed highly contaminated tubewells (according to TNO of the area). We collected water samples from all the 75 tubewells in Sonagazi and after analysing them in our laboratory by FI-HG-AAS we found 50% were safe to drink as per the permissible limit in Bangladesh, and only one sample contained as high as 0.52 µg/l (copy of our letter to TNO with arsenic concentration annexed in (Annexure-1).
(b) Mrs. Sara Whitemeyer from the Mennonite Central Committee (MCC), Noakhali,Bangladesj came to our institute a couple of times and was worried about the arsenic content in their tubewells. They had measured 700 samples with the help of a Field Fit. Their report showed (Annexure-2) that many tubewells measured by Field-Kit revealed 0.02 µg/l and 0.01 µg/l of arsenic. My question is: is it possible to measure arsenic concentration in the range of 0.01, 0.02 µg/l with the help of Field Kits?