A method for simultaneous determination of 19 organochlorine pesticide residues in Panax notoginseng

Abstract

The present invention relates to a detection method of 19 kinds of organochlorine pesticide residues in Panax notoginseng. The method comprises the following steps: (1) Preparation of the test solution: take medicinal material powder, add petroleum ether to soak, suction filter, and use Wash with petroleum ether several times, transfer to a round-bottomed flask, rotatively evaporate in a water bath at 25-45°C until nearly dry, redissolve with n-hexane, add concentrated sulfuric acid, shake fully, centrifuge after the reaction is complete, and take the supernatant for later use (2) Preparation of mixed reference substance solution: get 19 kinds of pesticide standard items and put in volumetric flask and add n-hexane and dilute to the scale to get each reference substance stock solution, take by weighing respectively reference substance stock solution and put in volumetric flask, use normal hexane Dilute to the mark to get the mixed reference substance solution; (3) Determination method: take the test solution, mix the reference substance solution and inject it into the gas chromatograph for determination.

Description

Technical field: [0001] The invention relates to a method for detecting pesticide residues in traditional Chinese medicines, in particular to a method for simultaneously determining the residues of 19 kinds of organochlorine pesticides in Panax notoginseng. Background technique: [0002] The use of pesticides has brought great contributions to human life, while the abuse of pesticides has also caused certain harm to the human body. At present, with the continuous and in-depth development of standardized planting of Chinese medicinal materials, the problem of pesticide residues in medicinal materials has attracted more and more attention from scholars all over the world. Organochlorine pesticides were widely used in traditional Chinese medicine cultivation, but due to their long half-life, slow degradation and stable chemical properties, their use was banned in my country in the 1980s, but residual components can still be detected in water, soil and plants. . During the grow...

AI Technical Summary

Problems solved by technology

The above methods are cumbersome to prepare samples, take a long time to test, use more toxic reagents such as dichloromethane, etc., column chromatography needs to be filled and processed, and require high testing personnel. These are not suitable for daily production testing.

Images