Citation: DONG Ya-Lei, LIU Wen-Jing, CAO Jin, WANG Gang-Li. Determination of 38 Kinds of Pesticide Residues in Nuts by QuEChERS-Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(9): 1397-1404. doi: 10.11895/j.issn.0253-3820.160885 shu

Determination of 38 Kinds of Pesticide Residues in Nuts by QuEChERS-Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry

1.
National Institutes for Food and Drug Control, Beijing 100050, China;2 China Pharmaceutical University, Nanjing 211198, China

Received Date: 5 December 2016
Revised Date: 23 June 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (No.21405159)

A multi-residue analysis method was developed for the determination of 38 kinds of pesticides in nuts (almonds, peanuts, cashew nuts and walnuts) by QuEChERS-ultra-high performance liquid chromatography-tandem mass spectrometry. The pesticide residues were extracted with acetonitrile. The extract was cleaned up with PSA, C₁₈ and Oasis PRiME HLB, and then analyzed by UPLC-MS/MS with multiple reaction monitoring (MRM) mode. External standard method was employed to quantify. The limits of detection (LODs, S/N=3) of this method were between 0.01 and 10 μg/kg, and the limits of quantitation (LOQs, S/N=10) were between 0.05-20 μg/kg. All of the tested pesticides showed good linear relationship (r>0.991). The practical samples were determined at three spiked levels and the average recoveries were between 51.0% and 126.0%. The RSDs were less than 20%. This method was simple, sensitive and accurate, and could be used for the routine analysis of pesticide residues in nuts.
- Ultra-high performance liquid chromatography-tandem mass spectrometry,
- QuEChERS,
- Multi-pesticide residues,
- Nuts
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沈阳化工大学材料科学与工程学院沈阳 110142