title: Application of static liquid-phase microextraction to the analysis of organochlorine pesticides in water.
abstract: Static liquid-phase microextraction, with subsequent analysis by gas chromatography-electron-capture detection, has been applied to extract eight organochlorine pesticides from water. A conventional microsyringe was used to extract analytes from water samples over a concentration range of 0.05-100 microg/l. Factors relevant to the extraction process were investigated. The sensitivity of the method was enhanced with agitation, and increasing the extraction temperature, of the sample solution. Concentration factors of >50-fold were easily achieved within 25 min of extraction. The analytical data exhibited a relative standard deviation (RSD) range of 3.2% (lindane) to 10.7% (methoxychlor) for the eight pesticides; most RSD values were under 7%. Water samples collected from a reservoir, and from tap water in a chemical laboratory were analyzed using the procedure.
authors.affiliation: Department of Chemistry, National University of Singapore, Singapore.
authors.forename: L
authors.initials: L
authors.lastname: Zhao
authors.forename: H K
authors.initials: HK
authors.lastname: Lee
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods*; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D012680:Sensitivity and Specificity; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D014874:Water Pollutants, Chemical