FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (10): 169-172.doi: 10.7506/spkx1002-6630-201310036

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Determination of Benzoylurea Insecticides in White Grape Juice by High Performance Liquid Chromatography

ZHOU Jian-ke,HAN Chao-jia,TANG Cui-ling,FU Yan-fang   

  1. Research Center of Physics and Chemistry Analysis, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding 071002, China
  • Received:2012-03-17 Revised:2013-03-29 Online:2013-05-25 Published:2013-05-07

Abstract:

Residues of benzoylurea insecticides (teflubenzuron, triflumuron, diflubenzuron and hexaflumuron) in white
grape juice were determined by dispersive liquid-liquid micro-extraction combined with normal-phase high performance
liquid chromatography. In the dispersive liquid-liquid micro-extraction, the extraction solvent was methylene chloride and
dispersive solvent was methanol. The analytes were separated on Apollo Silica column with a mobile phase made up of
n-hexane and anhydrous alcohol (97:3, V/V) at a flow rate of 1.0 mL/min and detected at 200 nm. Good linearity was found
in the range of 0.33 to 100 μg/mL with correlation coefficients above 0.999. The limits of detection were between 5.80 ng/mL and
6.60 ng/mL. The average recoveries of the benzoylurea insecticides ranged from 73.72% to 97.85%, with relative standard
deviations between 1.33% and 4.62%. The proposed method is rapid and highly reproducible and shows a limit of detection.
Therefore it is applicable for the determination of benzoylurea insecticide residues in white grape juice.

Key words: high performance liquid chromatography (HPLC), benzoylurea, dispersive liquid-liquid micro-extraction, white grape juice

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