Abstract:
A method was developed for the rapid determination of 7 pesticide multiresiduals such as trifluralin, dicofol, propargite in eels by gas chromatographywith dispersive solidphase extraction.The compounds were extracted from homogenized tissue with acetonitrile.Watersoluble and fatsoluble impurities in acetonitrile was removed by a moderate amount of hexane and deionized water, and acetonitrile purified byAluminaN, C18 and PSA dispersive solid phase extraction mixed power was ready for GCMS analysis.The detectionlimits(S/N=3)were in the range of 0.002-0.01 mg/kg.Tests for recovery were made by addition of mixed standardsof 0.01 mg/kg, and the results were 80.7%-118%,and the relative standard deviations were 3.2%-6.4%. Tests for recovery were made by addition of mixed standardsof 0.02 mg/kg, and the results were 79.8%-114%, and the relative standard deviations were 3.3%-5.9%.