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Citation: QU Li, LI You, ZENG Jing, SHENG Yonggang, YI Xionghai, CHENG Jia. Determination of 20 pyrethroid residues in vegetable foods by gas chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, ;2017, 35(7): 778-784. doi: 10.3724/SP.J.1123.2017.01012 shu

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

QU Li ^1,2, ,
LI You ¹ ,
ZENG Jing ¹ ,
SHENG Yonggang ¹ ,
YI Xionghai ¹ ,
CHENG Jia ¹

1.
Shanghai Entry-Exit Inspection and Quarantine Bureau, Shanghai 200135, China;
2.
Fudan University, Shanghai 200032, China

Received Date: 11 January 2017

Fund Project: Shanghai Project for Technical Barriers to Trade (No.13TBT002)

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