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LC-MS/MS method for analyzing pesticide latent components in pesticide products

A LC-MS and pesticide technology, which is applied in the analysis of materials, material separation, instruments, etc., can solve the problems of low technical level of recessive component detection and difficult quantification, and achieve high sensitivity, wide coverage and strong pertinence.

Pending Publication Date: 2019-10-18
TIANJIN INSTITUE OF QUALITY STANDARD & TESTING OF AGRICULTUAL PRODS
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low level of existing detection technology and difficult quantification of illegally added hidden ingredients in pesticide products, and to establish an accurate screening method for hidden ingredients in pesticide products

Method used

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  • LC-MS/MS method for analyzing pesticide latent components in pesticide products
  • LC-MS/MS method for analyzing pesticide latent components in pesticide products
  • LC-MS/MS method for analyzing pesticide latent components in pesticide products

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Comparison scheme
Effect test

Embodiment 1

[0034] Taking the 10% imidacloprid wettable powder as a sample, the method of the present invention is used for sample pretreatment, and the ultra-high performance liquid chromatography-tandem mass spectrometry is used for determination. The preparation method is as follows:

[0035] 1. Instruments and reagents

[0036] American Waters ultra-high performance liquid chromatography-tandem mass spectrometer I-Class / Xevo TQ-S triple quadrupole mass spectrometer; Swiss Mettler electronic balance with a sensitivity of 0.00001g; ultrasonic extractor; the purity of pesticide standards is not less than 99%, Purchased from Dr.E Company in Germany; acetonitrile and formic acid are chromatographically pure.

[0037] 2. Sample pretreatment method

[0038] a. Accurately weigh 20 mg of the pesticide product in a beaker, accurate to 0.1 mg, add 80 mL of acetonitrile, ultrasonicate for 30 minutes, transfer all to a 100 mL volumetric flask, add 10 mL of acetonitrile to clean the beaker, and t...

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Abstract

The invention provides an LC-MS / MS method for analyzing pesticide latent components in pesticide products. The method is characterized by establishing a precise screening method for latent componentsof eighty kinds of pesticides in pesticide products by using liquid chromatography-tandem mass spectrometry (LC-MS / MS). A proper number of pesticide products are weighed; acetonitrile ultrasonic extraction and dilution treatment are performed; and after membrane processing, injection and analysis are performed directly. The method having advantages of wide coverage, high specificity and high practicability is suitable for various pesticide products with accurate qualitative and quantitative effects; a problem that the current pesticide hidden components are difficult to be detected qualitatively and quantitatively is solved; and the technical support for accurate detection of the supervision and inspection of the pesticide quality is provided.

Description

Technical field: [0001] The invention belongs to the technical field of safety screening of agricultural inputs, and relates to an accurate screening method for 80 high-risk, high-detection hidden pesticide components in agricultural inputs, which is applicable to 9 types of pesticide products and can meet the quality and safety supervision of pesticides Sampling technical requirements. Background technique: [0002] In recent years, with the strengthening of supervision by government departments at all levels, the quality of pesticide products in the pesticide market has been continuously improved, but counterfeit and inferior pesticides still account for a certain proportion, and the counterfeiting patterns are constantly being refurbished. Some pesticide distributors and representatives of production companies even add some Hidden ingredients are used as "selling points" to promote and recommend to farmers, which poses a serious threat to agricultural production and the q...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 李娜张玉婷李辉刘磊邵辉卢娜李晋津张宇娇郭永泽
Owner TIANJIN INSTITUE OF QUALITY STANDARD & TESTING OF AGRICULTUAL PRODS
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