Determination of carbendazim and metiram pesticides residues in reapeseed and peanut oils by fluorescence spectrophotometry

Fluorescence spectrophotometry was applied to the determination of pesticide residue (carbendazim and metiram) in edible oil (rapeseed oil and peanut oil). Based on the fluorescence spectra of the oil-pesticide mixture, the prediction models between fluorescence intensity and pesticide content can be obtained. Functional relationship were found between fluorescence intensity and concentration of pesticide in the mixture and the correlation coefficient were greater than 0.99. We can calculate the detection limit is 7.07 x 10(-4) mg/mL for rapeseed oil and 9.28 x 10(-4) mg/mL for peanut oil, respectively. The prediction experiments show that the percent recovery range from 92.5% to 108.2%. It was verified that the fluorescence spectrophotometry method in this paper was feasible to detect the pesticide residues in edible oil. This study provides a new way for the detection of pesticide residues. (C) 2015 Elsevier Ltd. All rights reserved.