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Solid-phase extraction-gas chromatography tandem mass spectrometry detection method for pyrazol bactericides in wine

A medium pyrazole, gas chromatography technology, applied in the field of food testing, can solve problems such as threats to human health and high residues

Active Publication Date: 2015-04-29
韩超
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these pyrazole fungicides are relatively friendly to the environment, if they are not used properly in agricultural products, they will cause high residues in food and threaten human health

Method used

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  • Solid-phase extraction-gas chromatography tandem mass spectrometry detection method for pyrazol bactericides in wine
  • Solid-phase extraction-gas chromatography tandem mass spectrometry detection method for pyrazol bactericides in wine
  • Solid-phase extraction-gas chromatography tandem mass spectrometry detection method for pyrazol bactericides in wine

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Experimental program
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Embodiment 1

[0034] Include the following steps:

[0035] (1) Preparation of samples to be tested: Weigh 5.0 g of wine samples, add 3 mL of ultrapure water and mix to obtain the solution to be tested;

[0036] (2) Solid-phase extraction purification: Take the HLB SPE column, activate the SPE column with methanol and water in sequence, take all the liquid to be tested to the SPE column, and then use 4-6mL water and 4-6mL methanol / water mixed solution (v / v, 2 / 3) Rinse the SPE column, vacuum the SPE column to dryness, elute the SPE column with 6-8mL of methanol to obtain the eluate, concentrate the eluate, and dilute it with 2 mL of methanol The sample solution to be tested is obtained after the pore filter membrane;

[0037](3) Configuration of standard solution: Take penflufen, flufenapyramide, pyraclostrobin, pyrimazole, and furamet standard products, and prepare them with methanol to prepare single-dose solutions with a mass concentration of 200 mg / L. Standard stock solution, when used...

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Abstract

The invention discloses a solid-phase extraction-gas chromatography tandem mass spectrometry detection method for pyrazol bactericides in wine. According to the method disclosed by the invention, five pyrazol bactericides such as penflufen, fluxapyroxad, isopyrazam, rabenzazole and furametpyr in a wine sample can be simultaneously measured. The method comprises the following steps: adding ultrapure water into the wine sample, diluting to obtain a to-be-detected solution; purifying the to-be-detected solution by using an HLB solid-phase extraction column, and separating by using a C18 reversed-phase column; performing qualitative analysis on a target analyte in a multiple-reaction monitoring mode by comparing retention time and ion pair information, and performing external standard quantification. The method has the advantages of high analysis speed, high sensitivity, high reproducibility and high accuracy, and a novel detection method is provided for evaluating the quality of the wine sample.

Description

Technical field [0001] Five pyrazole sterilizers such as pyrimazole and pyrobacteria. Background technique [0002] During the management of the main raw materials in wine production, in order to prevent diseases and insect pests, a certain amount of pesticides are usually sprayed. Some pesticides are not easy to remove and decompose during wine production and fermentation.Health brings potential harm. [0003] Bybaches is a type of low -toxic pesticide used to prevent and treat plant diseases caused by various pathogenic microorganisms, which mainly refers to fungicides.At present, pyrazole -like compounds have become one of the hotspots of new type of fungicide development because of its efficiency, low toxicity, and pyrazole replacement base transformation.These sterilizers have a special way and have a variety of biological activity.For example, PyraClostrobin is a methoxyl acrylic mitochondrost electron transmission inhibitor, showing the extensive inhibitory effect on many ...

Claims

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Application Information

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IPC IPC(8): G01N30/88
Inventor 韩超陈祥准夏碧琪周永芳刘滨刘翠平
Owner 韩超
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