Removal of Organic Phosphorus Pesticide Residues in French Beans for Canned Food

A trial was conducted for obtaining the better method to remove residues of Dimethoate,Dichlorvos,Triazophos and Methamidophos in French beans.The trail was designed by orthogonal array.The treatment factors are Ozone at levels of 0,5,10,15,20 min,soakage at levels of 5,10,15,20,25min,rinse at levels of 1,2,3,4,5 times,and additions including detergent、dietary alkali,edible vinegar、starch.The French beans were collected from Guangxi.In the trail,the removal of Dimethoate,Dichlorvos,Triazophos and Methamidophos in French bean were 26.61% to 78.75%、8.10% to 62.86%、75.26% to 95.25% and l6.45% to 79.45%,respectively.The sequence of four influence factors was additionssoakage timeOzonerinse.The best treatment was that French beans were in the water contained 2% edible vinegar for 20 min under Ozone,and kept in the above water without Ozone for 25 min,finally rinsed with tap water for twice with each time 1 min.The influence sequence of ozone on removal of four pesticide residues was MethamidophosDimethoateDichlorvosTriazophos.In the Ozone treatment,the removal in the seal-treated was better than in the open-treated.