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Ultrasonication followed by single‐drop microextraction combined with GC/MS for rapid determination of organochlorine pesticides from fish
Author(s) -
Shrivas Kamlesh,
Wu HuiFen
Publication year - 2008
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200700380
Subject(s) - chromatography , chemistry , sonication , extraction (chemistry) , solvent , sample preparation , detection limit , gas chromatography , gas chromatography–mass spectrometry , organochlorine pesticide , pesticide , mass spectrometry , organic chemistry , agronomy , biology
A novel, rapid and simple sample pretreatment technique termed ultrasonication followed by single‐drop micro‐extrcation (U‐SDME) has been developed and combined with GC/MS for the determination of organochlorine pesticides (OCPs) in fish. In the present work, the lengthy procedures generally used in the conventional methods like, Soxhlet extraction, supercritical fluid extraction, pressurized liquid extraction and microwave assisted solvent extraction for extraction of OCPs from fish tissues are minimized by the use of two simple extraction procedures. Firstly, OCPs from fish were extracted in organic solvent with ultrasonication and then subsequently preconcentrated by single‐drop micro‐extraction (SDME). Extraction parameters of ultrasonication and SDME were optimized in spiked sample solution in order to obtain efficient extraction of OCPs from fish tissues. The calibration curves for OCPs were found to be linear between 10–1000 ng/g with correlation of estimations in the range 0.990–0.994. The recoveries obtained in blank fish tissues were ranged from 82.1 to 95.3%. The LOD and RSD for determination of OCPs in fish were 0.5 ng/g and 9.4–10.0%, respectively. The proposed method was applied for the determination of bioconcentration factor in fish after exposure to different concentrations of OCPs in cultured water. The present method avoids the co‐extraction of lipids, long extraction steps (>12 h) and large amount of organic solvent for the separation of OCPs. The main advantages of the present method are rapid, selective, sensitive and low cost for the determination of OCPs in fish.