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2007•Journal of Instrumental AnalysisRequires access

Determination of Imidacloprid Residue and Its Distribution in Pears by SCX-Solid-phase Extraction-High Performance Liquid Chromatography

LI Cong-jiu

Open publisher page 1 citations

Abstract

A method was developed for the determination of imidacloprid residue in the pericarp and pulp of pear with SCX-solid phase extraction(SPE)-high performance liquid chromatography(HPLC).The sample was extracted with acetonitrile and the extract was clean-up with SCX-SPE after LLE with dichloromethane;the content of imidacloprid was determined by HPLC with diode-array detection.The average recoveries of imidacloprid in pear pericarp(spiked at 0.1,0.5,and 1 mg/kg) and pear pulp(spiked at 0.05,0.5 and 1 mg/kg) ranged from 83% to 103% with relative standard deviation(RSD10%).The detection limit was 0.05 mg/kg.The results of the study of the degradation dynamic of imidacloprid residue indicated that the residue was mostly left in the pear pulp.

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What this paper is about

A method was developed for the determination of imidacloprid residue in the pericarp and pulp of pear with SCX-solid phase extraction(SPE)-high performance liquid chromatography(HPLC).The sample was extracted with acetonitrile and the extract was clean-up with SCX-SPE after LLE with dichloromethane;the content of imidacloprid was determined by HPLC with diode-array detection.The average recoveries of imidacloprid in pear pericarp(spiked at 0.1,0.5,and 1 mg/kg) and pear pulp(spiked at 0.05,0.5 and 1 mg/kg) ranged from 83% to 103% with relative standard deviation(RSD10%).The detection limit was 0.05 mg/kg.The results of the study of the degradation dynamic of imidacloprid residue indicated that the residue was mostly left in the pear pulp.

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Available abstract

A method was developed for the determination of imidacloprid residue in the pericarp and pulp of pear with SCX-solid phase extraction(SPE)-high performance liquid chromatography(HPLC).The sample was extracted with acetonitrile and the extract was clean-up with SCX-SPE after LLE with dichloromethane;the content of imidacloprid was determined by HPLC with diode-array detection.The average recoveries of imidacloprid in pear pericarp(spiked at 0.1,0.5,and 1 mg/kg) and pear pulp(spiked at 0.05,0.5 and 1 mg/kg) ranged from 83% to 103% with relative standard deviation(RSD10%).The detection limit was 0.05 mg/kg.The results of the study of the degradation dynamic of imidacloprid residue indicated that the residue was mostly left in the pear pulp.

Key concepts: Chemistry, Imidacloprid, Chromatography, Residue (chemistry), Solid phase extraction, PEAR, High-performance liquid chromatography, Detection limit

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Determination of Imidacloprid Residue and Its Distribution in Pears by SCX-Solid-phase Extraction-High Performance Liquid Chromatography — Research Paper | ScholarLens