title: Determination of organochlorine pesticides in water using dynamic hook-type liquid-phase microextraction.
abstract: We developed a simple and efficient headspace liquid-phase microextraction (LPME) technique named dynamic hook-type liquid-phase microextraction (DHT-LPME) and used it in combination with gas chromatography-mass spectrometry (GC-MS) and an electron capture detector (ECD). Aqueous specimens of organochlorine pesticides (OCPs) were used as model compounds to demonstrate the effectiveness of the technique. In the present study, the calibration curves were linear over at least 2 orders of magnitude with R(2) values of 0.997. The method detection limits (MDLs) varied from 2 to 44.0 ngL(-1). The precision of DHT-LPME ranged from 6.5 to 14.4%. The relative recoveries of OCPs in rainwater were more than 84.2%. Enrichment factors (EF) in the range 275-1127 were obtained using DHT-LPME.
authors: Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan.
authors: Pai-Shan
authors: PS
authors: Chen
authors: Shih-Pin
authors: SP
authors: Huang
authors: Ming-Ren
authors: MR
authors: Fuh
authors: Shang-Da
authors: SD
authors: Huang
mesh_terms: D002138:Calibration; D005591:Chemical Fractionation / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000302:isolation & purification; D010575:Pesticides / Q000032:analysis*; D012492:Salts / Q000737:chemistry; D012680:Sensitivity and Specificity; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D012492:Salts; D012997:Solvents; D014874:Water Pollutants, Chemical; D014867:Water