Chinese Journal of Chromatography

Chinese Journal of Chromatography ›› 2017, Vol. 35 ›› Issue (7): 778-784.DOI: 10.3724/SP.J.1123.2017.01012

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Determination of 20 pyrethroid residues in vegetable foods by gas chromatography-tandem mass spectrometry

QU Li1,2, LI You1, ZENG Jing1, SHENG Yonggang1, YI Xionghai1, CHENG Jia1   

  1. 1. Shanghai Entry-Exit Inspection and Quarantine Bureau, Shanghai 200135, China;
    2. Fudan University, Shanghai 200032, China
  • Received:2017-01-11 Online:2017-07-08 Published:2013-10-18
  • Supported by:

    Shanghai Project for Technical Barriers to Trade (No.13TBT002);Science and Technology Project of General Administration of Quality Supervision,Inspection and Quarantine (No.2015IK012).

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Abstract:

A method of gas chromatography-tandem mass spectrometry (GC-MS/MS) was developed for the simultaneous determination of 20 pyrethroid residues in vegetable foods. The samples were extracted by acetone-n-hexane (1:1, v/v), cleaned up by activated charcoal column and quantified by external standard method. The correlation coefficients (r2) of all the 20 pyrethroid pesticides in the range of 0.005-1.0 mg/L were not less than 0.990. The limits of detection (LODs) were 2.0 μ g/kg when signal/noise (S/N) > 3. The limits of quantification (LOQs) were 5.0 μ g/kg (S/N > 10). For recovery test, there were three levels (low, medium and high) spiked in 11 matrices. The average recoveries of the method were 75.2%-107% and the relative standard deviations (RSDs, n=6) were 3.08%-12.1%. The results demonstrated that the method is simple and has specific pretreatment steps. The method is suitable for the screening and confirmation of the 20 pyrethroid pesticides in vegetable foods.

Key words: gas chromatography-tandem mass spectrometry (GC-MS/MS), pyrethroid residues, vegetable foods

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