EXAMINATION AND REMOVAL OF ORGANOPHOSPHORUS PESTICIDE RESIDUES IN VEGETABLES AND FRUITS IN LINYI CITY

Objective To investigate the situation of organphosphorus pesticide residues in vegetables and fruits in Linyi City and to study the methods of removing them.Methods Surveys were performed in 2004 and 2005.115 samples including 86 vegetables and 29 fruits were collected to detect 8 kinds of organophosphorus pesticides.Vegetables were contaminated with pesticide,and then treated with different methods.Results 16.3% of the vegetables and 24.1% of the fruits were detected.Among all of the 8 kinds of organophosphorus pesticides,6 were detected in this survey and 52.6% of them are prohibited from being used in planting vegetables ang fruits according to relevant law and regulation.The unqualified rates were similar between leaf,melon,root-steam and phaseolus vegetables(P0.05),and the detection rate of vegetables planted in greenhouse was higher than that in the outside(P0.05).The removal rates of alkaline,detergent,saline and boiled water immersion were 71.4%,65.4% and 62.7% respectively,all higher than that of clean water wash(45.5%).Conclusion The situation of organphosphorus pesticide residues in vegetables and fruits in Linyi should be paid more attention to and some methods such as using sodium chloride can remove most of the organphosphorus pesticide in vegetables.