Multiresidue analysis and dietary risk assessment of pesticides in eight minor vegetables from Guizhou, China

Several minor vegetables are widely employed as hot pot dishes and condiments in Southwest China. To gain insight into pesticide exposure risk via the intake of minor vegetables, vegetable samples (400) obtained from different farms in Guizhou were subjected to multiresidue analyses. Gas chromatography-tandem mass spectrometry and high performance liquid chromatography-tandem mass spectrometry were developed to detect and quantify 97 pesticide residues simultaneously in samples using modified QuEChERS methods. The results showed that no pesticides were detected in 248 samples. Pesticides of different levels were detected in 152 samples, of which 69 samples exhibited residue concentrations exceeding maximum residue limit of European Union. The acute and chronic dietary exposure risk of 15 pesticides in eight minor vegetables were accepted. The risk ranking result showed the most samples contained low-risk pesticides. The results will provide a reference for designing future pesticide supervision programs and risk management programs.