Determination of 23 Organochlorine and Pyrethroid Pesticide Residues in Cucumber by Solid-Phase Extraction and Capillary Gas Chromatograph

Abstract

Abstract: Objective:The solid-phase extraction and capillary gas chromatography were introduced for determining 23 organochlorine and pyrethroid pesticide residues in cucumber. Method:The organochlorine and pyrethroid pesticides were extracted from cucumber samples with n-hexane by ultrasonic method and cleaned up by Florisil solid-phase extraction column. Then,the extract was separated by capillary column(30 m ×0.25 mm i.d. ×0.25μ m)and detected by ECD(electron capture detector). Results:The average recoveries for spiked standards are 76.0%～110.1%. The relative standard deviations are 0. 81%～3.28%. The range of limit of detection(LOD) is 0.03～2.06 μg/kg. Conclusion:The method is effective,fast and accurate.

Key words: capillary gas chromatography, solid-phase extraction, organochlorine pesticides, pyrethroid pesticides, cucumber

KONG Xiang-Hong, HAI Yun, LE Ai-Shan, LI Jian-Hua, CHOU Nong-Xue. Determination of 23 Organochlorine and Pyrethroid Pesticide Residues in Cucumber by Solid-Phase Extraction and Capillary Gas Chromatograph[J]. FOOD SCIENCE, 2007, 28(2): 267-270.

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Determination of 23 Organochlorine and Pyrethroid Pesticide Residues in Cucumber by Solid-Phase Extraction and Capillary Gas Chromatograph

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