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A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
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Raman spectroscopy of white wines
Coralie Martin1, Jean-Luc Bruneel2, François Guyon3
1Université 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.
Food Chemistry
|March 22, 2015
Summary
Raman spectroscopy shows promise for white wine analysis. Near-UV laser excitation enables selective detection of hydroxycinnamic acids and sugars like fructose and glucose.
Area of Science:
- Analytical Chemistry
- Spectroscopy
Background:
- Raman spectroscopy is a powerful technique for molecular analysis.
- Analyzing complex mixtures like wine presents challenges due to overlapping signals and fluorescence interference.
Purpose of the Study:
- To investigate the feasibility of using Raman scattering for white wine analysis.
- To explore the potential of different laser wavelengths for spectral interpretation and analyte detection.
Main Methods:
- Investigated Raman scattering using three laser wavelengths: 325 nm (near-UV), 532 nm (visible), and 785 nm (near-infrared).
- Analyzed UV-visible absorption and laser-induced fluorescence of two white wine samples to aid spectral interpretation.
- Utilized electronic resonance enhancement with 325 nm excitation for improved signal detection.
Main Results:
- Selective detection and analysis of hydroxycinnamic acids were achieved using 325 nm laser excitation due to resonance enhancement.
- Fructose and glucose were readily detected below approximately 1000 cm(-1) using Raman spectroscopy.
- Absorption and fluorescence properties were characterized to support Raman spectral interpretation.
Conclusions:
- Raman spectroscopy, particularly with near-UV excitation, is a viable technique for white wine analysis.
- The method allows for the selective detection of key compounds like hydroxycinnamic acids and sugars.
- This study highlights the potential of Raman spectroscopy for quality control and authentication in the wine industry.
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