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A kind of method and its application of detection thiafuramide residual amount

A thifuramide and residue technology is applied in the field of detecting thifuramide residues in grains, and detecting thifuramide residues, which can solve the problems of expensive mass spectrometry equipment, unpopular application, strict pretreatment requirements, etc. Guarantee people's food safety, good separation effect, high sensitivity effect

Active Publication Date: 2021-01-29
INST OF PLANT PROTECTION SHANDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above methods, mass spectrometry equipment is expensive and requires strict pretreatment of samples, resulting in unpopular application, and there is a matrix effect on the instrument response, which will also have a certain impact on the quantitative determination of samples; and electron capture Although the detector has high sensitivity, it has serious impurity interference and complicated pre-treatment purification.
All of these make the detection of thifuramide residues limited

Method used

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  • A kind of method and its application of detection thiafuramide residual amount
  • A kind of method and its application of detection thiafuramide residual amount
  • A kind of method and its application of detection thiafuramide residual amount

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Experimental program
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Effect test

Embodiment 1

[0052] Embodiment 1: the detection of thifluxamide residue in rice

[0053] (1) Sample pretreatment

[0054]Weigh 5g of rice crushed through a 20-mesh sieve and mixed into a 50mL centrifuge tube, add 10mL of double-distilled water to soak for 20min, add 10mL of acetonitrile, vortex for 1min, and add 5g of sodium chloride to mix evenly to obtain a sample liquid;

[0055] Vortex the sample solution for 1 min, and centrifuge at 8000r / min for 5min, take 7mL of the upper acetonitrile phase supernatant to a 50mL centrifuge tube pre-filled with 0.35gPSA and 0.98g of anhydrous magnesium sulfate, and centrifuge at 5000r / min Treat for 5min; then take 4mL of the supernatant and pass it through a 0.22μm filter membrane into a 50mL chicken heart bottle, dry it with nitrogen, add 2mL of petroleum ether-acetone solvent (1:1, V / V) and mix well to obtain the test solution , and then moved into the sample bottle to be determined by GC-FPD.

[0056] (2) Preparation of standard working solutio...

Embodiment 2

[0075] The detection of Thiofuramide residual amount in the wheat of embodiment 2

[0076] (1) Sample pretreatment

[0077] Weigh 5g of wheat crushed through a 20-mesh sieve and mixed into a 50mL centrifuge tube, add 10mL of double distilled water to soak for 20min, add 10mL of acetonitrile, vortex for 1min, add 5g of sodium chloride to obtain a sample solution;

[0078] The obtained sample solution was vortexed for 1 min, and centrifuged at 8000r / min for 5min, then 7mL of the upper acetonitrile phase supernatant was taken into a 50mL centrifuge tube pre-filled with 0.35gPSA and 0.98g of anhydrous magnesium sulfate, and centrifuged at 5000r / min After centrifugation for 5 min, 4 mL of the supernatant was passed through a 0.22 μm filter membrane and placed in a 50 mL chicken heart bottle, blown dry with nitrogen, and mixed with 2 mL of petroleum ether-acetone (1:1, V / V) to obtain the Sample solution, and transferred to the sample bottle to be determined by GC-FPD.

[0079] (2)...

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Abstract

The invention belongs to the technical field of pesticide residue detection, specifically relates to a method for detecting the residual amount of thifluzamide, and further discloses its application for detecting the residual amount of thifluzamide in grains. The method for detecting thifluzamide described in the present invention uses a gas chromatography-flame photometric detector to detect, which can effectively detect the residual amount of thifluzamide in grain samples, and the method is simple and fast to operate, has good separation effect, and has high accuracy. It has the advantages of high sensitivity, good repeatability, easy operation, rapidity and accuracy.

Description

technical field [0001] The invention belongs to the technical field of pesticide residue detection, specifically relates to a method for detecting the residual amount of thifluzamide, and further discloses its application for detecting the residual amount of thifluzamide in grains. Background technique [0002] Thiofuramide, also known as Thifluzamide, English common name thifluzamide, product name Mansui, chemical name is N-[2,6-dibromo-4-(trifluoromethoxy)phenyl]-2-methyl Base-4-trifluoromethyl-5-thiazole carboxamide, the pure product is white powdery solid, is a thiazole amide fungicide developed by Monsanto Company of the United States, and it has been sold globally since 2010. [0003] Thiofuramide works by inhibiting succinate dehydrogenase in the tricarboxylic acid cycle of pathogenic bacteria, leading to the death of bacteria, and has strong systemic conductivity and long-lasting effect. Thiofuramide is active against pathogenic fungi such as Ustilago, Puccinia, Rhi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/062
Inventor 李瑞娟刘同金于建垒宋国春付亚萍王伟
Owner INST OF PLANT PROTECTION SHANDONG ACAD OF AGRI SCI
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