Lettuce(Lactuca sativa),spinach(Spinacia oleracea),and kinds of green leafy vegetables were exposed to pesicide chlorpyrifos and carbofuran to study the effects of commercial wash methods(water and NaHCO3solution) on the removal of the residues.The response surface method was used to modify the best cleaning mode which involves washing temperature,time,and solution concentration.The results showed that,NaHCO3 solution could significantly lower pesticide of the green leafy vegetables than water,and the best cleaning condition was washing at 42℃for 28 min with 18‰ mass fraction of NaHCO3 solution.The pesticide residue removal rate was up to 73.88%.
