Determination of organophosphorus pesticides in peanut oil by dispersive solid phase extraction gas chromatography–mass spectrometry
2011; Elsevier BV; Volume: 879; Issue: 30 Linguagem: Inglês
10.1016/j.jchromb.2011.09.016
ISSN1873-376X
AutoresRui Su, Xu Xu, Xinghua Wang, Dan Li, Xueyuan Li, Hanqi Zhang, Aimin Yu,
Tópico(s)Analytical chemistry methods development
ResumoThe organophosphorus pesticides including phorate, diazinon, tolclofos-methyl, fenitrothin, malathion, fenthion, isocarbophos, quinalphos and phenamiphos, in peanut oils were determined by liquid-liquid extraction coupled with dispersive solid phase extraction and gas chromatography-mass spectrometry (GC-MS). The mixture of multi-walled carbon nanotubes and alumina was used as adsorbent in dispersive solid phase extraction. The effects of some experimental conditions, such as types of multi-walled carbon nanotubes, amount of adsorbents and extraction time were examined. The limits of detection for the analytes were between 0.7 and 1.6 μg kg(-1). The obtained recoveries of the analytes in the samples were between 85.9 and 114.3% and relative standard deviations were lower than 8.48%.
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