2, 4-dichlorophenoxyacetic acid standard substance preparation method and application thereof

Abstract

The invention discloses a 2, 4-dichlorophenoxyacetic acid standard substance preparation method and the application thereof. The preparation method comprises the steps of (1) preparing a test solution; (2) preparing the liquid chromatography; (3) collecting. According to the technical scheme of the invention, a semi-preparative liquid chromatography system is adopted, and a prepared and separated dichlorophenoxyacetic acid standard sample is high in purity, simple in process, stable in product quality and good in uniformity. Meanwhile, involved solvents are free of pollution, so that the clean production is enabled. The 2, 4-dichlorophenoxyacetic acid standard substance preparation method has the advantages of low cost, environment-friendly extraction process, simple preparation method and the like. The prepared standard substance can make up the technical blank in the development field of 2, 4-dichlorophenoxyacetic acid standard substances in China.

Description

technical field [0001] The invention relates to a method for preparing a 2,4-dichlorophenoxyacetic acid standard substance and an application thereof, belonging to the field of compound extraction and preparation. Background technique [0002] In recent years, food safety issues have continued to turmoil, and problems such as pesticide residues and chemical additives exceeding the standard have occurred frequently, causing heavy casualties and property losses, endangering people's physical and mental health, and making food safety issues increasingly become a hot spot of concern to the whole society. Therefore, the study of pesticide residues has important theoretical and practical significance for ensuring the food safety of the people. [0003] 2,4-Dichlorophenoxyacetic Acid (2,4-Dichlorophenoxyacetic Acid) is a widely used chemical, referred to as 2,4-D. Pure 2,4-D can exist in the form of flakes, powders, crystal powders and solids. It is white with a slight tan color a...

AI Technical Summary

Problems solved by technology

At present, the types and amounts of pesticides used in my country are the largest in the world, but there are still few corresponding reference materials, among which there are 126 types of secondary pesticide reference materials, and 17 primary pesticide reference materials, which shows that my country has the largest number of pesticide reference materials in the world. There is still a huge gap in research and development. At the same time, as of now, there is no research institution in China that can provide 2,4-dichlorophenoxyacetic acid standard substances and their preparation methods, while importing foreign-produced 2,4-dichlorophenoxyacetic acid standard substances The substance has problems such as high cost, cumbersome procedures, and long delivery cycle. Therefore, it is particularly necessary and urgent to prepare corresponding standard substances for the determination of 2,4-dichlorophenoxyacetic acid content.

Images