title: Solvent-based de-emulsification dispersive liquid-liquid microextraction combined with gas chromatography-mass spectrometry for determination of trace organochlorine pesticides in environmental water samples.
abstract: In this work, we propose solvent-based de-emulsification dispersive liquid-liquid microextraction (SD-DLLME) as a simple, rapid and efficient sample pretreatment technique for the extraction and preconcentration of organochlorine pesticides (OCPs) from environmental water samples. Separation and analysis of fifteen OCPs was carried out by gas chromatography-mass spectrometry (GC/MS). Parameters affecting the extraction efficiency were systematically investigated. The detection limits were in the range of 2-50 ng L(-1) using selective ion monitoring (SIM). The precision of the proposed method, expressed as relative standard deviation, varied between 3.5 and 10.2% (n=5). Results from the analysis of spiked environmental water samples at the low-ppb level met the acceptance criteria set by the EPA.
authors: Department of Food Technology, School of Food Technology and Nutrition, Alexander Technological Educational Institute (ATEI) of Thessaloniki, 57400 Thessaloniki, Greece.
authors: Constantinos K
authors: CK
authors: Zacharis
authors: Paraskevas D
authors: PD
authors: Tzanavaras
authors: Konstantinos
authors: K
authors: Roubos
authors: Kico
authors: K
authors: Dhima
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D004655:Emulsions / Q000737:chemistry; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000302:isolation & purification; D010573:Pesticide Residues / Q000032:analysis* / Q000302:isolation & purification; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000302:isolation & purification; D014992:Xylenes / Q000737:chemistry
chemical_list: D004655:Emulsions; D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D014874:Water Pollutants, Chemical; D014992:Xylenes; D014867:Water; C031285:3-xylene