Determination of Organophosphorous Pesticide Residue in Water Samples using Gas Chromatography- Electron Capture Detector

Abstract

Most wastewater contains pollutants, which may deteriorate the quality of receiving water bodies and harm associated aquatic life. Pesticides contamination to water systems have received particular attention during the last few years. Organophosporous pesticide residue values in surface water samples from Deg Nallah are reported in this study. The samples were extracted with 15 % methylene chloride in hexane and analyzed on a gas chromatograph equipped with an electron capture detector using capillary column. Contamination levels in all sites were found to be below the maximum acceptable concentration (MAC) as described by National Environmental quality standards (NEQS) Pakistan. High-resolution gas liquid chromatographic (HR-GLC) analysis of the to water samples, detected diazinon, dichlorvos, mevinphos, dimethoate, methyl parathion, malathion, fenitrothion, chlorpyriphos, endosulfan, prothiopos, profenophos, ethion and T-BHC at trace level.