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Citation: DENG Huifen, ZHANG Jianying, HUANG Ke, ZHONG Tiantian, LIN Limin. Determination of 105 pesticide residues in vegetables by QuEChERS-liquid chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, ;2018, 36(12): 1211-1222. doi: 10.3724/SP.J.1123.2018.09012 shu

Determination of 105 pesticide residues in vegetables by QuEChERS-liquid chromatography-tandem mass spectrometry

Food Inspection & Quarantine Center, Shenzhen Customs, Shenzhen 518045, China

Received Date: 6 September 2018

Fund Project: Former General Administration of Quality Supervision, Inspection and Quarantine Project (Nos. 2017IK271, 2017IK262).

After optimization of the QuEChERS pretreatment method, combined with liquid chromatography-tandem mass spectrometry (LC-MS/MS) technology, a multi-residue determination method was established for 105 typical insecticides, bactericides, herbicides, and plant growth regulators in vegetables. The target compounds were extracted by acetonitrile, purified with 150 mg primary secondary amine (PSA), 150 mg EC-C18, and 30 mg graphitized carbon black (GCB) adsorbents. The standard curves of 105 target compounds were linear in the concentration range of 0.010-0.200 mg/L, with correlation coefficients (r)>0.99. The limit of quantification was 0.010 mg/kg, the recoveries were between 68.2% and 108% at three spiked levels, and the RSDs of the method were between 1.02% and 11.8%. The method is suitable for the rapid determination of the common pesticides in vegetables owing to its advantages of rapidity, simplicity, and better purification.
- QuEChERS,
- liquid chromatography-tandem mass spectrometry (LC-MS/MS),
- pesticide residues,
- vegetables
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