Determination of Organochlorine Pesticide and Herbicide Residues in Cucumber by Gas Phase Chromatography with Electron Capture Detector
LUO Jun-xia
XIAO Hai-na
XU Wei-xia
LIU Cui
ZHAO Jian-bo
Abstract：A method was established to detect pesticide and herbicide residues by solid phase extraction-gas chromatography-electron capture detector. Cucumber samples were extracted with acetonitrile, purified with SPE column(Florida silica),determined with electron capture detector, and quantified by the external standard. In our test we set three levels of pesticides and herbicides, and the results show that the mean recoveries were 68.0%-120.3%,RSD was 2.0%-20.8%and the detection limits were between 0.000 9-0.027 4 mg/kg. A good linearity was obtained in the range of 103 with coefficiemts better than 0.998 7. The method has high sensitivity and good repeatability. It can be used as a method for the determination of pesticide residues in vegetables. There are some matrix effects of 9 pesticides in cucumber. Propanil and Butachlor has strong matrix suppression effect and the others have weak enhancement effect.
Keywords：CucumberChromatographyCentrifugationFiltrationMatrix effect
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 18-21 )