Determination of Fenpyroximate Residue in Orange by Matrix Solid-phase Dispersion and Liquid Chromatography

Abstract

Abstract: A method was developed for the determination of fenpyroximate residue in orange samples based on matrix solid- phase dispersion(MSPD) and HPLC. The results showed that taking neutral alumina as a matrix dispersing agent, the fenpyroximate residue in orange samples is appropiate for MSPD extraction. Fenpyroximate is extracted with ethyl acetate and the extract is subsequently cleaned up on an alumina column.The fenpyroximate residue is determined by high-performance liquid chromatography.The limit of quantitation is 0.0625mg/kg. With orange pulp and orange peel spiked by fenpyroximate, covering the concentration range of 0.1 to 1.0mg/kg, the average recovery and relative standard deviations(RSD)of this method are 81.9%～96.3% and 3.73%～7.54% ,respectively.

Key words: matrix solid-phase dispersion(MSPD), fenpyroximate, residue, orange, liquid chromatography

WANG Jin, YUE Yong-De, HUA Ri-Mao, TANG Feng, LI Xue-De, CAO Hai-Qun. Determination of Fenpyroximate Residue in Orange by Matrix Solid-phase Dispersion and Liquid Chromatography[J]. FOOD SCIENCE, 2007, 28(1): 239-242.

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Determination of Fenpyroximate Residue in Orange by Matrix Solid-phase Dispersion and Liquid Chromatography

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