Gas chromatography-mass spectrometry rapid determination method for non-registered components in pesticide preparation

Abstract

The invention relates to a gas chromatography-mass spectrometry rapid determination method for non-registered components in a pesticide preparation, and belongs to the technical field of pesticide quality detection. The gas chromatography-mass spectrometry rapid determination method for the non-registered components in the pesticide preparation comprises the following steps of preparing a standardsolution; preparing a sample solution; preparing a blank solution; performing GC-MS detection: injecting the standard working solution and the blank solution into a GC-MS, performing selected ion monitoring, and performing regression analysis on the corresponding concentrations of the non-registered components by the quantitative ion peak areas of the non-registered components after blank deduction, so as to obtain a standard working curve; and injecting a to-be-detected sample solution into the GC-MS under the same condition, obtaining the quantitative ion peak areas of the non-registered components in the sample after blank deduction, and substituting the quantitative ion peak areas into the standard working curve, so as to obtain the content of the non-registered components in the sample. According to the method disclosed by the invention, the capability of performing high-throughput accurate qualitative screening and accurate quantitative detection on the 131 non-registered components in the pesticide preparation is realized, so that the detection types and the detection efficiency are greatly improved.

Description

technical field [0001] The invention relates to a gas chromatography-mass spectrometry rapid determination method for non-registered components in pesticide preparations, belonging to the technical field of pesticide quality detection. Background technique [0002] Pesticides are important means of agricultural production and disaster relief materials. They play an indispensable role in preventing and controlling agricultural pests, ensuring agricultural production, increasing farmers' income and storing agricultural products. However, in recent years, in order to pursue economic benefits, reduce production costs, improve the control effect of pesticide products, and evade the supervision of pesticide registration policies, some pesticide manufacturers have added non-registered ingredients, also known as recessive ingredients or unregistered ingredients, to pesticide preparations without authorization. , has become an "open secret" and "hidden rule" in the industry, seriously...

AI Technical Summary

Problems solved by technology

[0007] In fact, the non-registered ingredients in pesticides are unknown before confirmation, and have strong concealment, randomness, diversity and complexity. Conventional gas chromatography, liquid chromatography and other chromatographic methods can only rely on retention Qualitative and quantitative analysis can not efficiently and accurately detect all the pesticide ingredients that may be added without authorization, and there are big defects in the detection of non-registered ingredients in pesticides, while gas chromatography-mass spectrometry, liquid chromatography-tandem mass spectrometry, etc. The chromatography-mass spectrometry method takes into account the high separation efficiency of chromatography and the characteristics of accurate identification of compound structures by mass spectrometry, which is very suitable for the comprehensive, accurate and efficient detection of non-registered components in pesticides

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