Investigation and analysis on organophosphorus pesticide residues in the vegetables in Kaifeng markets

Objective: To understand the organophosphorus pesticide residues of the vegetables in Kaifeng City Markets.Methods: 248 copies of the three categories of fresh vegetables were collected randomly,and organophosphorus pesticide residues were detected with the weather chromatography.Results: The exceeding rate of organophosphorus pesticide residues in leafy vegetables was significantly higher than that in fruit and root vegetables.The main organophosphorus pesticides which polluted vegetables in Kaifeng markets was methamidophos,phorate,dichlorvos,parathion,Diazinon and other pesticides.The detection and exceeding rate of organophosphorus pesticides was significantly higher in summer and autumn than that in winter and spring.Conclusion: The organophosphorus pesticide residues are very serious in the vegetables in Kaifeng markets,the management of the safety of pesticides needs strengthening.We should enhance the farmers' quality and science spraying,and eliminate the pesticides' security risks on human health.