Rapid pre-treatment method and detection method used for wine pesticide residues analysis

A technology for wine and pesticide residues, applied to the analysis of materials, measuring devices, material separation, etc., can solve the problems of high solvent consumption and long processing time, and achieve the effects of short time consumption, low cost, and few steps

Active Publication Date: 2016-02-17
COFCO NUTRITION & HEALTH RES INST +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] In this regard, the purpose of the present invention is to overcome the disadvantages and deficiencies of the existing sample pretreatment technology, such as long processing time

Method used

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  • Rapid pre-treatment method and detection method used for wine pesticide residues analysis
  • Rapid pre-treatment method and detection method used for wine pesticide residues analysis
  • Rapid pre-treatment method and detection method used for wine pesticide residues analysis

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Embodiment

[0026] 1. Preparation of standard solution

[0027] The standard solution was diluted with acetone and prepared into a 10 μg / mL mixed standard stock solution, which was stored at -18°C.

[0028] 2. Sample pretreatment

[0029] Extraction: Take 10g of shaken wine and put it in a 50mL centrifuge tube, add an appropriate amount of internal standard substance (epoxyheptachlor B), add 20mL of acetonitrile (containing 1% acetic acid), 4g of sodium chloride and 1g of anhydrous sodium acetate, After manual shaking for 2 minutes, ultrasonic extraction was performed for 20 minutes. During ultrasonication, ice packs should be added to prevent the water temperature from rising rapidly. After adding 6g of anhydrous magnesium sulfate, shake quickly for 2 minutes, and centrifuge at 3000r / min for 5 minutes in a low-speed centrifuge.

[0030] Purification: Take a 15mL polypropylene centrifuge tube, add 50mg of graphitized carbon black, 250mg of N-propylethylenediamine bonded silica gel and 1g...

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Abstract

The invention relates to a method for pre-treatment of wine, the wine is a sample which is waiting for being detected for content of pesticide residues, and the method comprises three steps of extraction, purification and concentration. The invention also relates to a pesticide residues detection method for the wine, and the pre-treatment method performs pre-treatment on the wine sample. The pre-treatment method can realize rapid pre-treatment on the wine sample for detecting the pesticide residues, and has the advantages of less step, short time consumption, no requirement of massive organic solvent, environmental protection and low cost.

Description

technical field [0001] The invention relates to a rapid pretreatment method for analyzing pesticide residues in wine and a detection method using the pretreatment method. Specifically, the present invention performs rapid pretreatment on wine samples, thereby using gas chromatography-mass spectrometry to simultaneously detect the residues of multiple pesticides in wine. Background technique [0002] Fungicides are agents that can kill or inhibit the growth of pathogenic microorganisms, and have a wide range of applications. Wine grapes are susceptible to fungal diseases, so fungicides need to be sprayed several times during the planting process, including sulfur preparations, copper preparations, amines, aromatics, benzimidazoles, imides and triazoles, etc. Insecticides and herbicides are also important pesticides to prevent harmful organisms and protect plants. Commonly used ones include organophosphates, organochlorines, pyrethroids, carbamates, and diphenyl ethers. Resi...

Claims

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Application Information

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IPC IPC(8): G01N30/08G01N30/02
Inventor 章晴陈士恒杨永坛
Owner COFCO NUTRITION & HEALTH RES INST
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