A gas chromatographic method for the determination of trace amounts of glufosinate-ammonium, glyphosate and aminomethylphosphonic acid in drinking water

A technology of aminomethylphosphonic acid and gas chromatography, which is applied in the field of analysis and detection of harmful trace substances, can solve the problems that adsorption and elution take a lot of time, and there are few types

Active Publication Date: 2021-05-14
丁立平 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the deficiency that a large amount of organic solvents need to be used in the liquid-liquid extraction method existing in the detection pretreatment of trace glufosinate, glyphosate and its metabolite aminomethylphosphonic acid in existing drinking water; and the available solid phase extraction method There are few types of solid phase extraction products, and the adsorption and elution process takes a lot of time. The technical problem to be solved by the present invention is to provide a new type of roasted product adsorbent that is quickly adsorbed in a dispersed solid phase extraction method and is suitable for drinking water. Gas Chromatographic Method for Determination of Medium and Trace Glufosinate-ammonium, Glyphosate and Their Metabolite Aminomethylphosphonic Acid

Method used

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  • A gas chromatographic method for the determination of trace amounts of glufosinate-ammonium, glyphosate and aminomethylphosphonic acid in drinking water
  • A gas chromatographic method for the determination of trace amounts of glufosinate-ammonium, glyphosate and aminomethylphosphonic acid in drinking water
  • A gas chromatographic method for the determination of trace amounts of glufosinate-ammonium, glyphosate and aminomethylphosphonic acid in drinking water

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Embodiment 1

[0073] In Example 1, tap water was used as the sample matrix to carry out standard addition recovery experiments to verify the feasibility of the method of the present invention. The tap water samples were taken from the Technology Center of Fuqing Entry-Exit Inspection and Quarantine Bureau. After sampling, the water samples were placed in a refrigerator at 4°C for 1 hour.

[0074] Proceed as follows:

[0075] 1. Adsorption of trace target substances:

[0076] Take a 500mL separatory funnel and add 200mL of tap water to it, respectively take 2.00mL of the above-mentioned 10.0μg / L, 20.0μg / L and 200.0μg / L standard use solutions respectively, and prepare three-level six-parallel spiked positive samples, Add 0.20g methanesulfinate-magnesium aluminum type hydrotalcite roasted product adsorbent to each funnel afterwards, shake 10min to make the roasted product adsorbent adsorb traces of glufosinate-ammonium, glyphosate and its metabolite aminomethylphosphine in water acid;

[007...

Embodiment 2

[0090] In Example 2, well water was used as the sample matrix to carry out standard addition recovery experiments to verify the feasibility of the method of the present invention. The well water samples were taken from the production well water of Fuqing Longxiang Food Co., Ltd., and the water samples were refrigerated at 4°C after sampling. The box was brought back to the laboratory for analysis and testing.

[0091] Proceed as follows:

[0092] 1. Adsorption of trace target substances:

[0093] Take a 500mL separatory funnel and add 200mL of well water to each of them, take 2.00mL of the above-mentioned 10.0μg / L, 20.0μg / L and 200.0μg / L standard solutions respectively, and prepare three-level six-parallel spiked positive samples , then add 0.20g methanesulfinate-magnesium aluminum type hydrotalcite roasted product adsorbent to each funnel, shake for 10min to make the roasted product adsorbent adsorb traces of glufosinate-ammonium, glyphosate and its metabolite aminomethyl in...

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Abstract

The invention relates to a method for analyzing and detecting trace harmful substances, in particular to a gas chromatography method for measuring trace amounts of glufosinate-ammonium, glyphosate and their metabolite aminomethylphosphonic acid in drinking water. The method steps include enriching trace target compounds in drinking water with a novel methanesulfinate-magnesium-aluminum hydrotalcite roasting product adsorbent stone, eluting the target compounds with a saturated sodium chloride solution, adjusting the pH value with sodium hydroxide, and Using isopropyl chloroformate and trimethylsilylated diazomethane as derivatizers to derivatize the target object step by step, and apply gas chromatography for rapid analysis and determination. The new adsorbent used in this method adopts the method of dispersive solid phase extraction to achieve fast and efficient adsorption of the target substance. Compared with the method of solid phase extraction, it can save a lot of adsorption and elution time; it is only suitable for a small amount of organic solvent extraction. Compared with liquid-liquid extraction, which needs to use a large amount of organic solvent, it has significant safety, environmental advantages and economic advantages.

Description

technical field [0001] The invention relates to a method for analyzing and detecting harmful trace substances, in particular to a gas chromatography method for measuring trace amounts of glufosinate-ammonium, glyphosate and aminomethylphosphonic acid in drinking water. Background technique [0002] Glyphosate and Glufosinate ammonium are organophosphate herbicides. Among them, glyphosate is the herbicide with the highest sales volume in the world, and it is also the pesticide variety with the highest sales in the world. The sales volume in 2012 reached 4.575 billion US dollars; Because of the problem of glyphosate, people usually apply glufosinate in combination to ensure the yield and quality of crops. In 2012, the sales of glufosinate also reached 420 million US dollars. In recent years, the production and usage of these two herbicides have been increasing year by year, and their toxicity and possible food safety hazards have attracted people's attention. [0003] Since ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 丁立平张睿郑铃姜晖郑香平黄菁菁陈志涛郑麟毅蔡春平
Owner 丁立平
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