Citation: XU Zhi-Yi, CHEN Meng-Ting, HOU Xi-Ai, LIU Dan. Simultaneous Determination of Seven Pesticide Residues in Sesame Oil Using QuEChERS-High Performance Liquid Chromatography-Tandem Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(7): 928-936. doi: 10.19756/j.issn.0253-3820.191644 shu

Simultaneous Determination of Seven Pesticide Residues in Sesame Oil Using QuEChERS-High Performance Liquid Chromatography-Tandem Mass Spectrometry

College of Science, China Agricultural University, Beijing 100193, China

Received Date: 1 November 2019
Revised Date: 10 May 2020

A method for determination of multi-residues of seven target pesticides in sesame oil was established by dispersive solid-phase extraction of quick easy cheap effective rugged and safe method (QuEChERS) and HPLC-MS/MS. Seven kinds of pesticides often used in oil crops such as metalaxyl-M, butachlor, acetochlor, metolachlor, epoxiconazole, azoxystrobin and haloxyfop-P-methyl were determined. Due to the complexity of sesame oil matrix, the types of extraction solvent and cleaning agent in sesame oil matrix were selected and optimized. Finally, 10 mL of acetonitrile extraction, 60 mg of PSA and 20 mg of GCB were selected to effectively remove fat, pigment, organic acids and other interference impurities in sesame oil. In the concentration range of 0.001-10 mg/L, the standard solution concentration of seven target pesticides in sesame oil matrix showed a good linear relationship with the corresponding chromatographic response value, and the correlation coefficients were all greater than 0.99. The average recoveries of the three added concentrations in sesame oil were between 86.9% and 106.3%, and the RSDs were less than 5.2%. The accuracy, precision and sensitivity all met the requirements of pesticide residue analysis. This method was fast, simple and environmentally friendly and suitable for quantitative analysis of target pesticide residues in sesame oil.
- Sesame oil,
- Pesticide residue,
- QuEChERS,
- High performance liquid chromatography-tandem mass spectrometry,
- Oil purification
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