title: Raman spectroscopy of white wines.
abstract: The feasibility of exploiting Raman scattering to analyze white wines has been investigated using 3 different wavelengths of the incoming laser radiation in the near-UV (325 nm), visible (532 nm) and near infrared (785 nm). To help in the interpretation of the Raman spectra, the absorption properties in the UV-visible range of two wine samples as well as their laser induced fluorescence have also been investigated. Thanks to the strong intensity enhancement of the Raman scattered light due to electronic resonance with 325 nm laser excitation, hydroxycinnamic acids may be detected and analyzed selectively. Fructose and glucose may also be easily detected below ca. 1000 cm(-1). This feasibility study demonstrates the potential of the Raman spectroscopic technique for the analysis of white wines.
authors: Université de Bordeaux, CNRS, ISM UMR 5255, 351 cours de la Libération, F-33405 Talence Cedex, France; Advanced Track and Trace, ATT 99 avenue de la châtaigneraie, F-92500 Rueil Malmaison, France.
authors: Coralie
authors: C
authors: Martin
authors: Université de Bordeaux, CNRS, ISM UMR 5255, 351 cours de la Libération, F-33405 Talence Cedex, France.
authors: Jean-Luc
authors: JL
authors: Bruneel
authors: Service Commun des Laboratoires, 3 Avenue du Dr A. Schweitzer, F-33608 Pessac, France.
authors: François
authors: F
authors: Guyon
authors: Service Commun des Laboratoires, 3 Avenue du Dr A. Schweitzer, F-33608 Pessac, France.
authors: Bernard
authors: B
authors: Médina
authors: Université de Bordeaux, ISVV, EA4577 Unité de Recherche Oenologie, F-33140 Villenave D'ornon, France; INRA, ISVV, USC 1366 Œnologie, F-33140 Villenave d'Ornon, France.
authors: Michael
authors: M
authors: Jourdes
authors: Université de Bordeaux, ISVV, EA4577 Unité de Recherche Oenologie, F-33140 Villenave D'ornon, France; INRA, ISVV, USC 1366 Œnologie, F-33140 Villenave d'Ornon, France.
authors: Pierre-Louis
authors: PL
authors: Teissedre
authors: Université de Bordeaux, CNRS, ISM UMR 5255, 351 cours de la Libération, F-33405 Talence Cedex, France. Electronic address: f.guillaume@ism.u-bordeaux1.fr.
authors: François
authors: F
authors: Guillaume
mesh_terms: D007834:Lasers; D011786:Quality Control; D013059:Spectrum Analysis, Raman / Q000295:instrumentation / Q000379:methods*; D014920:Wine / Q000032:analysis*
keywords: Fluorescence spectroscopy; Hydroxycinnamic acids; Phenolic composition; Raman spectroscopy; Sugars; White wines