Method for measuring pyrethroid pesticides in grain by dispersion liquid micro-extraction-high performance liquid chromatography

A technology of high performance liquid chromatography and pyrethroids, which is applied in the field of food chemistry, can solve the problems of unfavorable operators and the environment, and achieve the effects of reducing adverse effects and damage, good reproducibility, and simple operation

Active Publication Date: 2019-09-13
SHANXI AGRI UNIV
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Problems solved by technology

However, the commonly used extraction agent in this method is an org

Method used

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  • Method for measuring pyrethroid pesticides in grain by dispersion liquid micro-extraction-high performance liquid chromatography
  • Method for measuring pyrethroid pesticides in grain by dispersion liquid micro-extraction-high performance liquid chromatography
  • Method for measuring pyrethroid pesticides in grain by dispersion liquid micro-extraction-high performance liquid chromatography

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[0026] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0027] The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

[0028] In the following examples, the standard products of bifenthrin, lambda-cypermethrin, deltamethrin, sodium chloride, acetonitrile, methanol, thymol, caprylic acid, pelargonic acid, and capric acid were all purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Ltd. Corn, wheat, barley, sorghum, rice, oats, and rye were all from Shanxi Agricultural University. Use the standard to prepare standard stock mixtures of the three targets and store them.

[0029] Agilent 1260 HPLC (Agilent); Eclipse Plus C18 column (250 × 4.6mm, 5 μm); SC-3610 low-speed centrifuge (Anhui Zhongke Zhongjia Instrument Co., Ltd.); electronic balance (Ohaus Instruments) (Changzhou) Co., Ltd.); refrigerator; vortex instrument.

[0030] The...

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Abstract

The invention belongs to the technical field of food chemistry, and provides a method for measuring pyrethroid pesticides in grain by dispersion liquid micro-extraction-high performance liquid chromatography. Thymol or choline chloride is used as a hydrogen-bond acceptor, valproic acid, hexylic acid, heptanoic acid, caprylic acid, n-nonanoic acid or capric acid is used as a hydrogen-bond donor, the mole ratio of the hydrogen-bond acceptor to the hydrogen-bond donor is 1/5, 1/4, 1/3, 1/2, 1/1, 2/1, 3/1 or 4/1; a hydrophobic eutectic solvent formed by mixing the hydrogen-bond acceptor and the hydrogen-bond donor is used as an extraction agent, liquid micro-extraction is performed, and the pyrethroid pesticides in grain are measured by high performance liquid chromatography. The method provided by the invention has the advantages of being simple to operate, quick, sensitive, less usage of extraction agent, easy to collect, green and environment-friendly, can be used for detecting pyrethroid pesticides in a number of grain samples. The usage of harmful organic solvent can be avoided, and less extraction agent is used; and the method has the significant advantages of being simple and quick to operate, easy to collect, green and environment-friendly, and good in reproducibility.

Description

technical field [0001] The invention belongs to the technical field of food chemistry, and in particular relates to a method for determining pyrethroid pesticides in grain by dispersion liquid-liquid microextraction-high performance liquid chromatography. Background technique [0002] Pyrethroid pesticides are a class of insecticides artificially synthesized by imitating natural pyrethrins. They are mainly used to control agricultural pests. However, due to their wide range of applications, large quantities, and large contact populations, poisoning cases frequently occur. In mild cases, headache and nausea may occur, and in severe cases, muscle fibrillation may occur, even accompanied by coma and renal dysfunction. And food can not only meet the basic needs of our human body, but also prevent and assist in the treatment of many diseases, so the quality control of food is very important. [0003] Dispersed liquid-liquid microextraction is equivalent to miniaturized liquid-li...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/062
Inventor 荆旭郭正艳王晓闻朱俊玲伊莉付丽红陈振家
Owner SHANXI AGRI UNIV
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