title: [Determination of organochlorine pesticides in water using solidification of floating organic drop liquid phase microextraction by gas chromatography].
abstract: OBJECTIVE
  To develop a new method for simultaneous determination of eight organochlorine pesticides (OCPs) in water samples using solidification floating organic drop liquid-phase microextraction (SFO-LPME) combined with gas chromatography-electronic capture detector (GC-ECD).
  
  
  METHODS
  The experimental conditions of SFO-LPME were determined with n-Hexadecane as extractant, water samples adjusted to pH 6.0, inonic strength increased by adding 15.0 g/100 mL NaCI. The OCPs were extracted at 55 degrees C for 10 mm and determined with GC-ECD.
  
  
  RESULTS
  A good linearity (correlation coefficients > or = 0.996) was obtained for eight target compounds from 5 ng/I. to 100 ng/L. The method detection limits ranged from 0.24 ng/L to 0.78 ng/L. Satisfactory results were achieved with samples of river water, piped water and farmland water, with an average recovery of 76.0%-106.0% and RSD of 3.24%-11.60%.
  
  
  CONCLUSIONS
  The proposed method is rapid, simple and sensitive. It is suitable for hatch analyses of eight organic chlorine pesticides in water samples.
authors.forename: Xiao-Xia
authors.initials: XX
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Yong
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Zou
authors.forename: Yue-Ping
authors.initials: YP
authors.lastname: Zhao
mesh_terms: D002849:Chromatography, Gas; D005618:Fresh Water / Q000032:analysis*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D059627:Liquid Phase Microextraction; D010575:Pesticides / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D014874:Water Pollutants, Chemical