Determination of Pesticides in Tap Water and River Water by HPLC using Concentration Technique with Polystyrene Gel Mini Cartrige

Abstract

Method for simultaneous determination of asulam, oxin-copper, thiuram, simazine (CAT), mecoprop, napropamide, iprodione, bensulide (SAP) and pencycuron in water was investigated by high performance liquid chromatograpy (HPLC) . Pesticides in waters were absorbed on polystyrene gel mini cartrige. And then the pesticides on cartrige were eluted with acetonitrile and determined by high performance liquid chromatograph equipped with a column of RS pak DE-613 or NOVAPAK C18. The recoveries of these pesticides in distilled water were more than 80% except asulam and oxin-copper. And those in river water were more than 89% except oxin-copper. But those in tap water were less than 36% except mecoprop, iprodione and pencycuron. These low recoveries were caused by residual chlorine in tap water.