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Method for detecting residual pesticide content in dairy products

A detection method and technology for pesticide residues are applied in the field of detection of pesticide residues in dairy products, which can solve problems such as time-consuming and labor-intensive, loss of target substances, and cumbersome pretreatment process, and achieve simple operation, reduced losses, and fewer impurity peaks. Effect

Active Publication Date: 2020-05-15
JUNLEBAO DAIRY GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the residual pesticide content in dairy products, so as to solve the cumbersome pretreatment process, time-consuming and labor-consuming, and excessive loss of target objects required for detecting residual pesticides in dairy products in the existing technical solutions. many questions

Method used

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  • Method for detecting residual pesticide content in dairy products
  • Method for detecting residual pesticide content in dairy products
  • Method for detecting residual pesticide content in dairy products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 A kind of detection method of residual pesticide content in dairy products

[0040] The reagents used in this example include acetonitrile (chromatographically pure, Fisher Scientific), n-hexane (chromatographically pure, Dima Company), and sodium chloride (analytical purely, Tianjin Yongda Chemical Reagent Co., Ltd.). Magnesium sulfate (analytical grade, Tianjin Yongda Chemical Reagent Co., Ltd.).

[0041] Pesticide mixed standard: purity ≥ 95.0%, brand: Alta, pesticide mixed standard components are flubendiamide, dichlorvos, carbaryl, diphenylamine, phorate, dimethoate, diazinon, chlorpyrifos-methyl , pirimiphos-methyl, fenpropimorph, chlorpyrifos, fipronil, profenofos, flusilazole, quinoxyfin, propiconazole, fluopicolide, pyraclostrobin, cyfluthrin, boscalid Amine, oxaflucone, the concentration of each component is 100 μg / mL respectively.

[0042] The instrument and equipment are gas chromatography-tandem mass spectrometer (equipped with electron bomba...

Embodiment 2-5

[0102] Example 2-5 A detection method of residual pesticide content in dairy products

[0103] Examples 2-5 are respectively a method for detecting the residual pesticide content in dairy products, and their steps are basically the same as in Example 1, except that the parameters in the process of configuring and measuring the sample liquid F to be tested are different, and the details are as follows: See Table 5:

[0104] Table 5 List of parameters

[0105]

[0106]

[0107] Measured according to the steps and conditions in the above table, the results are as follows,

[0108] The measurement result of embodiment 2:

[0109] (1) Qualitative measurement results:

[0110] Under the above instrument conditions, the retention time of flubendiamide was 5.83min, the retention time of dichlorvos was 6.49min, the retention time of carbaryl was 10.20min, the retention time of diphenylamine was 12.19min, and the retention time of phorate was 13.57min. The fruit retention time...

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Abstract

The invention belongs to the field of food detection, and discloses a method for detecting residual pesticide content in dairy products. According to the detection method, acetonitrile is matched withmagnesium sulfate and sodium chloride to extract residual pesticide in a dairy product to be detected, an obtained concentrated solution E is transferred to an acetonitrile activated C18 solid-phaseextraction column, eluted with acetonitrile to collect effluent, evaporated, dissolved with n-hexane and filtered to obtain a sample solution to be detected, and the sample solution to be detected isdetermined. According to the method, strong hydrophobic interferents and impurities in the dairy product are removed through a simple detection method to obtain a target object containing residual pesticide, so that the loss of the residual pesticide is reduced. The detection method provided by the invention is simple and convenient to operate, efficient and high in residual pesticide recovery rate, and solves the problems of complex pretreatment process, time and labor consumption and excessive target loss required for detecting residual pesticides in dairy products in the prior art. The method is suitable for detecting the residual pesticide content in the dairy product.

Description

technical field [0001] The invention belongs to the field of food testing and relates to dairy product testing, in particular to a method for detecting residual pesticide content in dairy products. Background technique [0002] With the improvement of residents' living standards, people pay more attention to food safety, especially when consuming dairy products. In order to ensure the quality and safety of dairy products, the country continues to increase the types of pesticide residue detection in milk, such as the release and implementation of GB / T 2763.1-2018, and the corresponding detection technology and requirements are also continuously improved. [0003] At present, gas chromatography is used to analyze pesticide residues as an important analysis method in chromatography, but the gas chromatography detection method has the problems of complicated pretreatment operation, high consumption of organic solvent, long detection time, many impurities on the machine and low r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/08G01N30/14
CPCG01N30/02G01N30/08G01N30/14G01N2030/062G01N2030/146Y02A50/30
Inventor 苏运聪齐晓茹李飞李兴佳张耀广柴艳兵白晓云王瑶
Owner JUNLEBAO DAIRY GRP CO LTD
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