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Method for detecting dinotefuran residue on rice

A technology of dinotefuran and rice, which is applied in the field of drug detection and achieves the effect of high accuracy

Inactive Publication Date: 2019-09-06
江苏恒生检测有限公司
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Problems solved by technology

[0004] In order to solve the problems of existing methods for detecting dinotefuran residues on rice, the present invention provides a method for detecting dinotefuran residues on rice

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  • Method for detecting dinotefuran residue on rice

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Embodiment

[0019] A method for detecting dinotefuran residues on rice, comprising the steps of:

[0020] S1. Extraction of dinotefuran in water: randomly take 5mL of water in the paddy field, filter it with a hydrophilic microporous membrane with a pore size of 0.22 μm, and obtain the test solution 1;

[0021] S2. Dehulling the plants through a rice sheller, separating and collecting rice husks and brown rice, pulverizing the plants through a grain grinder, and collecting plant powder;

[0022] S3. Extraction and separation of dinotefuran from rice husk: Accurately weigh 2.5g of rice husk and place it in a 50mL centrifuge tube, add 10mL of pure water to make it completely infiltrated, add 20mL of methanol after 10min, and extract by vortexing for 1h. Centrifuge under the condition of 4000r / min for 5min, take out all the supernatant into a 50mL volumetric flask, use purified water to make up to 50mL, and after mixing, filter through a 0.22um hydrophilic microporous membrane to obtain the ...

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Abstract

The invention provides a method for detecting dinotefuran residue on rice and relates to the technical field of medicine detection. The method comprises the following steps of: S1, filtering by usinga hydrophilic microporous membrane with a pore size of 0.22 micrometers to obtain a test solution 1; S2, shelling plants through a rice sheller, separating and collecting rice hulls and brown rice, pulverizing the plants through a grain pulverizer and collecting plant powder; S3, extracting and separating dinotefuran from the rice hulls and preparing a test solution 2; S4, extracting and separating the dinotefuran from the plant powder and preparing a test solution 3; S5, extracting and separating the dinotefuran from the brown rice and preparing a test solution 4; S6, extracting and separating the dinotefuran in soil and preparing a test solution 5; and S7, detecting through a liquid chromatography-mass spectrometry method. The method provided by the invention is simple in operation and high in accuracy.

Description

technical field [0001] The invention belongs to the technical field of drug detection, and relates to a method for detecting dinotefuran residues on rice. Background technique [0002] Dinotefuran is the latest generation of super neonicotinoid insecticides. Its chemical structure is quite different from the existing neonicotinoid insecticides. Its tetrahydrofuryl group replaces the previous chloropyridyl and chlorothiazolyl groups, and Does not contain halogen elements. At the same time, it is also different from nicotine in terms of performance, and has a wider insecticidal spectrum. Dinotefuran is a commonly used insecticide in the production process of rice, but there are few analysis of its residues in rice and rice growth environment, and there is no corresponding reference index for the impact on the environment and consumers. [0003] Therefore, there is an urgent need for a simple and highly accurate method for detecting dinotefuran residues on rice. Contents of...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 查欣欣
Owner 江苏恒生检测有限公司
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