Infield Detection of Arsenic Using Portable Digital Voltameter, PDV6000
Computing, Health and Science
Natural Sciences, Centre for Ecosystem Management
There are a growing number of countries in the world where arsenic (As) in groundwater, which is used for drinking and irrigation, has been detected at concentrations above the WHO safe drinking limit of I 0 j.1g/l. These include; Argentina, Bangladesh, Chile, China, Hungary, India, Mexico, Peru, Thailand, and the USA. Of a particular concern is the situation in Bangladesh where it is estimated that there are more than 1 million people drinking As-rich water (above 50 j.1g/l). It is imperative that people stop drinking from wells where As levels are high. However, as yet, there is no reliable, simple, and field-based method for As detection. This chapter presents some preliminary results from a method being currently developed to detect As in groundwater using portable digital voltameter (PDV6000). The evaluation of this infield method using ICP-MS shows that the voltammetric results are on average within 1.2 j.1gll of the laboratory-based spectrometric results.