A quantitative detection method for chlorantraniliprole residues in soil

Abstract

The invention provides a quantitative detection method for the residual quantity of chlorantraniliprole in the soil. The method is characterized in that the ultrasonic extraction of residual chlorantraniliprole in the soil is conducted in an acetonitrile solvent, and then impurities are removed by adopting a proper amount of MWCNTS and PSA adsorbent. An obtained supernate is subjected to nitrogen-blowing, concentrating and drying, and then the volume is metered by adopting an acetone and n-hexane mixed solvent, wherein the volume ratio of acetone to n-hexane in the mixed solvent is 1:1. After that, the obtained mixture is subjected to programmed warming and separating by adopting a HP-5 chromatographic column, and the ECD determination is conducted by an electronic capture detector. Finally, the residual quantity of chlorantraniliprole is quantitatively detected based on the matrix external standard method. Experiments prove that, the above method is simple, rapid and accurate in operation, easy to popularize and master, and low in cost. Therefore, the method provides a rapid and reliable method for the residual quantity measurement of chlorantraniliprole in the soil, and the requirements of the batch sample analysis on quality and progress can be met.

Description

technical field [0001] The invention relates to the field of detection methods for pesticide residues, in particular to a quantitative detection method for chlorantraniliprole residues in soil. The quantitative detection method is an improvement of using multi-walled carbon nanotubes (MWCNTS) and PSA as adsorbents The QuEChERS method removes impurities and purifies the samples, and then uses gas chromatography-electron capture detector (GC-ECD) to determine chlorantraniliprole in soil, so as to achieve the purpose of fast, simple and reliable. Background technique [0002] In recent years, with the prohibition and restriction of highly toxic pesticides such as organophosphorus and organochlorine in various countries in the world, and the rapid development of pest resistance to existing insecticides, the search for and development of pesticides with new mechanisms of action has become the focus of attention at home and abroad. . Chlorantraniliprole (CAS No.: 500008-45-7), al...

AI Technical Summary

Problems solved by technology

In the QuEChERS method, the adsorbent is the key factor determining the selectivity and sensitivity of the method. Traditional commercial adsorbents cannot meet the requirements of the current development of pesticide residue sample analysis technology due to low reuse rate, poor selectivity and high price.

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