Determination of 21 Pesticide Residues in Different Types of Vegetables by Optimized QuEChERS Method
In this paper,by optimizing the amount of water and purifying agent in the extraction and purification process of different vegetables,and using the multi-reaction monitoring mode of high performance liquid chromatography tandem mass spectrometry,an optimized method for the determination of 21 pesticide residues in different types of vegetables was established,with the detection limit of the method being 0.5-1.55 μg/kg and the relative standard deviation of 1.8%-7.5%.The results showed that the method had high sensitivity,stable recovery and good reproducibility,and was suitable for the rapid detection of a variety of pesticide residues in different types of vegetables.