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Method for measuring residual quantity of glufosinate, glyphosate and metabolite aminomethyl phosphonic acid thereof in tea

A technology for the determination of aminomethyl phosphate and its method, which is applied in the field of determination of glufosinate-ammonium, glyphosate and its metabolite aminomethyl phosphate residues in tea, which can solve the lack of physical and chemical properties such as chromophores and fluorophores , difficult to volatilize, difficult to dissolve and other problems, to achieve the effect of shortening the detection cycle, fast analysis speed and high sensitivity

Inactive Publication Date: 2018-03-27
诺安实力可商品检验(青岛)有限公司
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Problems solved by technology

Glufosinate-ammonium and glyphosate have similar structures, and both contain phosphonic acid groups, hydroxyl groups, and amino groups. They are extremely strong amphoteric compounds. Because they are easily soluble in water, they are difficult to dissolve in general organic solvents, difficult to volatilize, and lack chromophores. Physicochemical properties such as glufosinate, glyphosate and its metabolite aminomethyl phosphate are challenging to detect

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  • Method for measuring residual quantity of glufosinate, glyphosate and metabolite aminomethyl phosphonic acid thereof in tea
  • Method for measuring residual quantity of glufosinate, glyphosate and metabolite aminomethyl phosphonic acid thereof in tea
  • Method for measuring residual quantity of glufosinate, glyphosate and metabolite aminomethyl phosphonic acid thereof in tea

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Embodiment Construction

[0018] In order to make the objectives, technical solutions, and advantages of the present invention clearer and clearer, the following examples illustrate the present invention in further detail.

[0019] The present invention provides a method for determining the residual amount of glufosinate-ammonium, glyphosate and its metabolite aminomethyl phosphate in tea, wherein the method comprises the following steps:

[0020] Weigh 2.0 g of pretreated tea samples into a 50 mL centrifuge tube, add 20 mL of pure water, vortex to mix, and ultrasonically extract for 30 minutes, then add 20 mL of dichloromethane, vortex to mix, vortex and extract for 3 minutes, centrifuge at 4000 r / min for 3 minutes, and transfer Take 2mL of the upper water layer into the pre-activated SHS-SAX cartridge, discard the effluent, rinse with 3mL methanol, 3mL pure water, and drain; then use 2mL 0.25M sodium bicarbonate solution to elute and drain. Use a 15mL glass centrifuge tube to receive the purification solu...

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Abstract

The invention discloses a method for measuring the residual quantity of glufosinate, glyphosate and metabolite aminomethyl phosphonic acid thereof in tea. A liquid chromatography-tandem mass spectrometry method for measuring glufosinate, glyphosate and metabolite aminomethyl phosphonic acid thereof in tea is established by virtue of pure water extraction, dichloromethane liquid-liquid extraction and SHS-SAX solid phase extraction column purification and enrichment. The method is simple and fast, has high sensitivity and good reproducibility, and is successfully applied to daily inspection of tea samples.

Description

Technical field [0001] The invention relates to the technical field of trace chemical substance detection, in particular to a method for measuring the residual amount of glufosinate ammonium, glyphosate and their metabolite aminomethyl phosphate in tea. Background technique [0002] Organophosphorus herbicides are currently the most important herbicides in the international market, occupying the largest market share in the global herbicide varieties, and glyphosate and glufosinate-ammonium are the main products of this type of herbicides. With the increasing use of glufosinate and glyphosate herbicides, they are often found in environmental water samples, soils and plants. Such long-term accumulation will cause environmental pollution and pose a serious threat to human health. At present, all countries are paying close attention to it, and they have set strict limits. The research on the detection methods of glufosinate-ammonium, glyphosate and its metabolite aminomethyl phospha...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 赵春华付萌张伟伟邓锁成
Owner 诺安实力可商品检验(青岛)有限公司
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