Gas Chromatographice Determination of Ethiprole and Its Metabolic Products in Environmental Samples

To determine residues of ethiprole and its metabolic products in the environment,a determination method is established consisting accelerated solvent extraction(ASE)with ethionine,cleaning-up extraction with florisil column and determination using a gas chromatograph(GC)equipped with an electron capture detector.Results of the experiment show that the minimum detection level of ethiprole and its metabolic products is 0.01mg·kg^-1 in soil,rice plant,rice hull and brown rice;0.01 mg·kg^-1 in paddy water.The mean recovery rate of ethiprole and its metabolic products ranged from 72.8% to 103.6% in paddy water,paddy soil,rice plant,rice hull and brown rice.And relative standard deviation of the determination varied from 1.3% to 12.5%.