Citation:
CUI Shuhua, CHEN Weishuang, QIAN Jialiang, DUAN Hao, LIU Tongying, ZHANG Lidong. Determination of 193 pesticide residues in vegetables and fruits by gas chromatography-mass spectrometry[J]. Chinese Journal of Chromatography,
;2013, 31(9): 885-893.
doi:
10.3724/SP.J.1123.2013.02020
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On the basis of optimization of solid phase extraction adsorbent, eluting solvent types and amounts, a gas chromatography-mass spectrometric method was developed for the determination of 193 pesticide residues in vegetables and fruits. The analytes were extracted from the samples using acetonitrile. The extract was cleaned-up with a C18/PSA solid-phase extractor, eluted by acetonitrile and analyzed by GC-MS under selected ion monitoring (SIM) mode using triphenyl phosphate (TPP) as internal standard. The linear range was from 10 to 1000 μg/L for 130 pesticides, from 20 to 1000 μg/L for 34 pesticides, from 50 to 1000 μg/L for 26 pesticides, from 100 to 1000 μg/L for the other 3 pesticides with the good correlation coefficients (r≥0.9967). The limits of detection were 0.04-8.26 μg/kg. The mean recoveries of the pesticides were 71.6%-117.9%. The relative standard deviations were 3.0%-11.8%. This method is simple, rapid, sensitive and specific. It is appropriate for the simultaneous identification and quantification of the multi-residues in fruits and vegetables.
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