Study on determination of 11 organophosphorus pesticide residues in vegetable oil samples by gas chromatography combined with dispersive liquid-liquid microextraction

  • LI Fangfang ,
  • WANG Yanli ,
  • LI Jie ,
  • CHEN Qianqian ,
  • TIAN Qiyan ,
  • CHEN Keyun ,
  • JU Xiang ,
  • ZHAO Fa ,
  • ZHANG Hui ,
  • LIU Yanming
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  • (Shandong Institute for Food and Drug Control, Key Laboratory of Supervising Technology for Meat and Meat Products for State Market Regulation, Shandong Research Center of Engineering and Technology for Quality Control of Food for Special Medical Purposes, Shandong Research Center of Engineering and Technology for Safety Inspection of Food and Drug, Jinan 250101, China)

Received date: 2022-08-05

  Revised date: 2022-11-04

  Online published: 2023-11-20

Abstract

Based on green chemistry, a new method for the determination of 11 organophosphorus pesticide residues in vegetable oil was established, which selected green dispersive liquid-liquid microextraction as pre-treatment technology and gas chromatography-flame photometric detector with specificity for the detection of organophosphorus pesticides. The sample was dissolved in n-hexane, and extracted with N, N-dimethylformamide. The extraction solution was added with trace dichloromethane for dispersive liquid-liquid microextraction. The dichloromethane phase was detected by a flame photometric detector and quantified by an external standard method. The factors affecting the extraction efficiency were investigated, such as the conditions of sample extraction, the type and volume of extraction and dispersive solvent, and the concentration of sodium chloride. The best operational conditions were selected. Under the best operational conditions, the calibration curves were linear in the range of 0.01-1.00 μg/mL and the correlation coefficients were 0.999 1-0.999 7 for the 11 organophosphorus pesticides. The recoveries of the 11 organophosphorus pesticides ranged from 75.6% to 116.2% with relative standard deviation (RSD) values from 1.6% to 8.7% at three spiked levels of 0.01, 0.10, and 0.50 mg/kg. The limits of detection (LODs) were 0.002-0.003 mg/kg and the limits of quantification (LOQs) were 0.007-0.010 mg/kg. The method has been proven to be rapid, simple, and environmental-friendly, which is applicable to the determination of organophosphorus pesticides in vegetable oil.

Cite this article

LI Fangfang , WANG Yanli , LI Jie , CHEN Qianqian , TIAN Qiyan , CHEN Keyun , JU Xiang , ZHAO Fa , ZHANG Hui , LIU Yanming . Study on determination of 11 organophosphorus pesticide residues in vegetable oil samples by gas chromatography combined with dispersive liquid-liquid microextraction[J]. Food and Fermentation Industries, 2023 , 49(20) : 294 -299 . DOI: 10.13995/j.cnki.11-1802/ts.033212

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