title: Determination of organophosphorus pesticides in peanut oil by dispersive solid phase extraction gas chromatography-mass spectrometry.
abstract: The 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%.
authors.affiliation: College of Chemistry, Jilin University, Changchun 130012, PR China.
authors.forename: Rui
authors.initials: R
authors.lastname: Su
authors.forename: Xu
authors.initials: X
authors.lastname: Xu
authors.forename: Xinghua
authors.initials: X
authors.lastname: Wang
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.forename: Xueyuan
authors.initials: X
authors.lastname: Li
authors.forename: Hanqi
authors.initials: H
authors.lastname: Zhang
authors.forename: Aimin
authors.initials: A
authors.lastname: Yu
mesh_terms: D010367:Arachis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D016014:Linear Models; D037742:Nanotubes, Carbon / Q000737:chemistry; D009946:Organothiophosphorus Compounds / Q000032:analysis* / Q000302:isolation & purification; D000074241:Peanut Oil; D010575:Pesticides / Q000032:analysis* / Q000302:isolation & purification; D010938:Plant Oils / Q000032:analysis / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction / Q000379:methods*
chemical_list: D037742:Nanotubes, Carbon; D009946:Organothiophosphorus Compounds; D000074241:Peanut Oil; D010575:Pesticides; D010938:Plant Oils