QuEChERS-气相色谱-三重四极杆串联质谱法测定玉米中 7 种有机磷农药.

Dried corn was crushed to prepare samples, and the method of QuEChERS for extracting organophosphorus pesticides from corn was optimized, the economic and rapid extraction of organophosphorus pesticide residues in corn was realized, and gas chromatography triple quadrupole tandem mass spectrometry was established to qualitatively and quantitatively detect organophosphorus pesticides in samples. The results showed that the limit of detection(LOD) of seven organophosphorus pesticides was 0. 03-0. 49 μg / kg, limit of quantification(LOQ) was 0. 08-1. 62 μg / kg; the relative standard deviation (RSD) was 2. 2%-16. 7%, and the recovery rate was 63. 8%-122. 3%. This method had the characteristics of simplicity, fast response, high recovery rate, high sensitivity and strong resistance to matrix interference, and its suitable for the analysis and detection of organic phosphorus pesticides in corn crops. [ABSTRACT FROM AUTHOR]