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Visible micro-Raman spectroscopy for determining glucose content in beverage industry
I Delfino1, C Camerlingo, M Portaccio
1Biophysics and Nanoscience Centre, CNISM, Università della Tuscia, Viterbo, Italy.
Food Chemistry
|November 13, 2012
Summary
Raman spectroscopy can quantify glucose in sports drinks using a statistical analysis method. This offers a fast, on-line approach for the food industry, matching biochemical assay results.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Food Science
Background:
- Accurate quantification of sugars like glucose is crucial in the food industry, particularly for products such as sports drinks.
- Traditional methods for sugar analysis can be time-consuming and may require complex sample preparation.
Purpose of the Study:
- To investigate the potential of visible excitation Raman spectroscopy for quantitative glucose determination in sports drinks.
- To develop a rapid and simple method for on-line glucose quantification in food and beverage products.
Main Methods:
- Micro-Raman spectra (600-1600 cm(-1)) were recorded for four commercial sports drinks.
- A multivariate statistical analysis, specifically interval Partial Least Square (iPLS), was employed for quantification.
- An iPLS model was calibrated using glucose aqueous solutions of known concentrations.
Main Results:
- Raman spectra exhibited distinct vibrational fingerprints for glucose, fructose, and sucrose.
- The iPLS model successfully quantified glucose content in sports drinks.
- Predicted glucose concentrations showed good agreement with results from a biochemical assay.
Conclusions:
- Visible excitation Raman spectroscopy is a viable tool for quantitative glucose analysis in sports drinks.
- The developed iPLS method provides a fast and simple alternative for on-line glucose monitoring in the food industry.
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