sixteen organophosphorus pesticides , diazinon , diazinon-oxon , dimethoate , ronnel , beta-phosphamidon , methyl parathion , ethyl parathion , malathion , chlorpyrifos , fenitrothion , ruelene , methidathion , ethion , epn , phosalone , and phosmet , were extracted by amberlite xad-2 resin from 100 and 200 l drinking water previously spiked with these pesticides .
C0025709
methyl parathion
C0030514
ethyl parathion