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Method for detecting glufosinate-ammonium content in dairy product

A detection method and technology for dairy products, applied in measuring devices, instruments, scientific instruments, etc., can solve the problem of inability to detect the content of glufosinate-ammonium in dairy products, and achieve the effects of increasing extraction efficiency, high-efficiency purification effect, and easy operation.

Active Publication Date: 2021-01-22
JUNLEBAO DAIRY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the content of glufosinate-ammonium in dairy products to solve the problem that the content of glufosinate-ammonium in dairy products cannot be detected in the prior art solutions

Method used

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  • Method for detecting glufosinate-ammonium content in dairy product
  • Method for detecting glufosinate-ammonium content in dairy product
  • Method for detecting glufosinate-ammonium content in dairy product

Examples

Experimental program
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Embodiment 1

[0039] The detection method of glufosinate-ammonium content in a kind of dairy product of embodiment 1

[0040] This embodiment is a method for detecting the content of glufosinate-ammonium in dairy products, comprising the following steps in sequence:

[0041] 1) Put 5g of dairy product (milk in this example) into a 50mL centrifuge tube, measure 5mL of methanol solution containing 1% formic acid into the centrifuge tube, vortex and mix at room temperature for 10min, and then ultrasonically extract at room temperature for 10min , lower the temperature to 0°C, centrifuge at 10,000r / min for 5min, separate the supernatant, and obtain the purified solution;

[0042] Among them, the dairy product can be milk powder, milk, cheese, etc., and the sequence of the above steps can break the oil-in-water structure of the dairy product when it contains water, so that the residual glufosinate contained in the dairy product can be removed from the oil-in-water structure. exposed in the pack...

Embodiment 2～5

[0081] The detection method of glufosinate-ammonium content in the embodiment 2~5 dairy products

[0082] Embodiments 2 to 5 are respectively a method for detecting the content of glufosinate-ammonium in dairy products, and their steps are basically the same as in Example 1, except that the process parameters are different, see Table 4 for details:

[0083] Table 4 List of parameters of Embodiments 2 to 5

[0084]

[0085]

[0086] The measurement result of embodiment 2~5 is as follows:

[0087] (1) Qualitative determination

[0088] Retention time and deviation list of table 5 embodiment 2~5

[0089] Example Example 2 Example 3 Example 4 Example 5 keep time 1.54 1.53 1.52 1.53 deviation 0.65％ 0.00％ -0.65％ 0.00％

[0090] As can be seen from Table 5, the retention time of the chromatographic peak in the liquid to be tested is less than ± 2.0% for the retention time deviation of the corresponding retention time of the glufosinate-...

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Abstract

The invention belongs to the field of food detection, and discloses a method for detecting glufosinate-ammonium content in a dairy product. The method comprises the following steps: extracting glufosinate-ammonium in a dairy product by using a formic acid-containing methanol solution, adsorbing impurities by C18, adding a borate buffer solution and a chloroformic acid-9-fluorenyl methyl ester acetonitrile solution, carrying out a derivatization reaction, separating, filtering, and determining the obtained to-be-measured liquid . According to the invention, the target glufosinate-ammonium derivative is obtained by removing strong hydrophobic interferents and impurities in the dairy product through a simple detection method, so that the loss of residual glufosinate-ammonium is reduced; the detection method disclosed by the invention is simple and convenient to operate, efficient and high in glufosinate-ammonium recovery rate, and the problem that the glufosinate-ammonium content in the dairy product cannot be detected in the existing technical scheme is solved; and the method is suitable for detecting the content of the residual glufosinate-ammonium in the dairy product.

Description

technical field [0001] The invention belongs to the field of food detection and relates to the detection of dairy products, in particular to a method for detecting the content of glufosinate-ammonium in dairy products. Background technique [0002] Glufosinate-ammonium is a broad-spectrum contact-killing herbicide with weak systemic effect. Unlike glyphosate for root-killing, glufosinate-ammonium kills leaves first, and then conducts transpiration in plant xylem through plant transpiration. between dryness and glyphosate. Glufosinate-ammonium is a broad-spectrum, contact-killing, herbicide-killing herbicide, which can be used for almost all wide-row planted fruit trees, row crops, vegetables and non-cultivated land by directional spraying on weed stems and leaves. Although glufosinate-ammonium is a non-persistent pesticide, large amounts and arbitrary use will still leave some residues on crops, posing a threat to humans and animals. [0003] Now the detection methods for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/72
CPCG01N30/02G01N30/06G01N30/72G01N2030/067Y02P20/55
Inventor 齐晓茹白晓云苏运聪李飞李兴佳张耀广柴艳兵
Owner JUNLEBAO DAIRY GRP CO LTD
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