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Multiresidue analytical method of pesticides in peanut oil using low‐temperature cleanup and dispersive solid phase extraction by GC‐MS
Author(s) -
Li Li,
Zhang Hongyan,
Pan Canping,
Zhou Zhiqiang,
Jiang Shuren,
Liu Fengmao
Publication year - 2007
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.200700052
Subject(s) - chromatography , chemistry , extraction (chemistry) , anhydrous , pesticide , solid phase extraction , gas chromatography–mass spectrometry , amine gas treating , gas chromatography , mass spectrometry , organic chemistry , agronomy , biology
A method for the determination of 33 pesticides in peanut oil by GC‐MS was described. Two extraction procedures based on (i) low‐temperature extraction and (ii) liquid–liquid extraction were tested for the optimization of the method. The mixture of anhydrous MgSO 4 with primary secondary amine (PSA) or with PSA and C 18 was performed as sorbents in dispersive SPE. Low temperature along with PSA and C 18 cleanup gave the best results. Pesticides were identified and quantified by GC‐MS in SIM mode. The correlation coefficients, R 2 , in the linear range tests were better than 0.990. The average recoveries for most pesticides (spiked at 0.02, 0.05, 0.2, and 1 mg/kg) ranged from 70 to 110%, the RSD was below 20% in most instances, and LODs varied from 0.5 to 8 μg/kg.