Method for simultaneously determining various organophosphorus in vegetable oil by combining dispersive liquid-liquid microextraction with gas chromatography

A gas chromatography and dispersion liquid-liquid technology, applied in the field of rapid determination of various organic phosphorus in vegetable oil at the same time by dispersion liquid-liquid micro-extraction combined with gas chromatography, to achieve the effect of low cost, strong application value and high sensitivity

Active Publication Date: 2021-06-25
SHANDONG INST FOR FOOD & DRUG CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of this technology to study organophosphorus pesticide residues in vegetable oils has rarely been reported in China.

Method used

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  • Method for simultaneously determining various organophosphorus in vegetable oil by combining dispersive liquid-liquid microextraction with gas chromatography
  • Method for simultaneously determining various organophosphorus in vegetable oil by combining dispersive liquid-liquid microextraction with gas chromatography
  • Method for simultaneously determining various organophosphorus in vegetable oil by combining dispersive liquid-liquid microextraction with gas chromatography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1 Experimental part

[0036] 1.1 Instruments and materials

[0037] Shimadzu GC-2030 gas chromatography-flame photometric detector (GC-FPD); desktop high-speed refrigerated centrifuge (Germany Sigma). Dichlorvos, nemaphos, isodemeton-methyl, dichlorfos, parathion-methyl, fenthion, chlorpyrifos, pyrimiphos, aphidphos, protamifos, funthophos, fenfos, triazole Phosphorus, thioprofos, imophos, and saponin (all above 100 mg / L, 1 mL) were purchased from Beijing Zhenxiang Co., Ltd.; acetonitrile, acetone, methanol, ethyl acetate, n-hexyl Alkanes, 1,1,2-trichloroethane, toluene, dichloromethane, and chloroform were all chromatographically pure (Merck, Germany); N-N dimethylformamide (DMF), NaCl (Sinopharm Chemical Reagent Co., Ltd. ), corn oil, peanut oil, soybean oil, sunflower oil, and linseed oil were purchased from local supermarkets.

[0038] 1.2 Preparation of standard solution

[0039] Accurately pipette 100 μL of each pesticide standard with a concentration of 100 m...

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Abstract

The invention discloses a method for simultaneously and rapidly determining various organophosphorus in vegetable oil by combining dispersive liquid-liquid microextraction with gas chromatography, which belongs to the field of analytical chemistry. The method specifically comprises the following steps of: (1) preparing a mixed standard solution; (2) extracting a sample; (3) carrying out dispersive liquid-liquid microextraction; (4) carrying out gas chromatographic analysis; and (5) formulating a standard working curve and performing quantitative analysis. In the detection process, a large amount of organic solvent is not needed, and the method is green, environment-friendly, rapid, efficient, high in detection result sensitivity and good in reproducibility.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, and relates to a method for analyzing residues of various organophosphorus pesticides in vegetable oil, in particular to a method for quickly determining various organophosphorus in vegetable oil simultaneously by means of dispersion liquid-liquid microextraction combined with gas chromatography. Background technique [0002] Vegetable oil is an essential consumer product for human life, and its quality and safety are directly related to the health of consumers. my country is a big vegetable oil consumer, with a total vegetable oil consumption of 22.35 million tons, accounting for 18% of the world's total consumption. On the one hand, pesticide residues in vegetable oil come from the control of oil crops’ own diseases and insect pests. China’s national standard GB 2763-2019 clearly stipulates the maximum residue limits of 8 organophosphorus pesticides in grains and vegetable oils; on the other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
CPCG01N30/88G01N2030/884
Inventor 李芳芳陈倩倩鞠香田其燕王艳丽梁秀清李洁刘艳明王骏胡梅
Owner SHANDONG INST FOR FOOD & DRUG CONTROL
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