Fluorimetric determination of the fungicide benomyl after solvolysis |
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| Authors: | Francisco Garcia-Sánchez Alfonso Aguilar-Gallardo |
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| Institution: | (1) Department of Analytical Chemistry, Faculty of Sciences, University of Málaga, E-29071 Málaga, Spain |
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| Abstract: | A simple spectrofluorimetric method for the determination of the fungicide benomyl in grapes is described. Benomyl is rapidly solvolysed in organic solvents to give the highly fluorescent metabolite carbendazim. Solvent effects on the spectral shape and their influence on analytical performance are studied. DMF was found to be the best solvent. The method is sensitive to 12 ng/ml benomyl, and has an RSD at the 0.5  g/ml level of 2.2%. The method is suitable for determining benomyl in spiked grapes, with recoveries in the range 97 to 104%. |
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| Keywords: | spectrofluorimetry benomyl carbendazim residue analysis grapes fungicide |
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