Direct determination of biacetyl in fats by sensitized room temperature phosphorescence |
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| Authors: | A. Cepeda-Saez M.L. Vazquez L. Sargi P. Prognon G. Mahuzier E. Bisagni |
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| Affiliation: | Departemento de Quimica Analitica, Nutricion y Bromatologia, Facultad de Farmacia, Universidad de Santiago de Compostela, Santiago de Compostela Spain;Laboratoire de Chimie Analytique II, Faculté de Pharmacie, Rue J.B. Clément, 92290 Chatenay-Malabry France;Laboratoire de Synthèse Organique, Institut Curie, Centre Universitaire, 91400 Orsay France |
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| Abstract: | A direct method for the determination of biacetyl in butter and margarine by sensitized room temperature phosphorescence (SRTP) is described. After dissolution of the sample in hexane, biacetyl is isolated by distillation, and its native phosphorescence is sensitized by a non-polar linear furocoumarin, 4′5′-dihydro-3-carbethoxypsoralen. The limit of detection is 0.05 ng ml?1 biacetyl, with a linear response from 1 × 10?4 to 1 μg ml?1 (r = 0.999). The RSD is 3.5% at 100 ng ml?1. |
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