Abida Taskeen

Sources of Bisphenol A Contamination in Drinking Water in Pakistan and Determination of Migration Rates

This is a first study of BPA contamination in stored drinking water in Pakistan. Commercial filters, installed at ten different locations at Lahore College for Women University, were selected for analyses of BPA in triplicate by reversed phase High Performance Liquid Chromatography (HPLC). Migration of BPA in 10% ethanol at different exposure timings (24, 48, 72, 96 and 120 hours) was also determined (5.78-31.2 ppb, M=11, SD=9.7). The BPA contents detected in commercial filter samples were 1.38-11.30 ppb (M=5.99, SD=2.96). BPA amounts detected in samples plastic bottled samples ranged from 11.89 ppb to 12.42 ppb (M=12.15, SD=0.2). In plastic material of bottle BPA contents ranged from 5.78 ppb to 6.34 ppb (M=6.0, SD=0.2) after accounting for free BPA present in plastic-ware. The daily intake of BPA calculated (60 kg body wt.) was 12.42 μg/L/ body weight. Which far exceeded the provisional TDI of BPA set by Health Canada (25 μg/kg/body weight).