This paper is aimed at studying the removal efficiencies of the self-made detergents A,B,C and D(patent number: CN1398956)towards the removal of omethoate,dipterex,dimethoate and methamidophos residues in Brassica campestris L.ssp.Chinensis (L.)Makino.For our research purpose,we have studies the residues of Makino under different conditions,such as ultrasonic wave,ozone and normal conditions.By the analysis of GC-MS,the experimental results show that detergent A gives the best influence for removing these f...