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Type: Journal article
Title: Sensing free sulfur dioxide in wine
Author: Monro, T.
Moore, R.
Nguyen, M.
Ebendorff-Heidepriem, H.
Skouroumounis, G.
Elsey, G.
Taylor, D.
Citation: Sensors, 2012; 12(8):10759-10773
Publisher: Molecular Diversity Preservation International (MDPI)
Issue Date: 2012
ISSN: 1424-8220
Statement of
Tanya M. Monro, Rachel L. Moore, Mai-Chi Nguyen, Heike Ebendorff-Heidepriem, George K. Skouroumounis, Gordon M. Elsey and Dennis K. Taylor
Abstract: Sulfur dioxide (SO2) is important in the winemaking process as it aids in preventing microbial growth and the oxidation of wine. These processes and others consume the SO2 over time, resulting in wines with little SO2 protection. Furthermore, SO2 and sulfiting agents are known to be allergens to many individuals and for that reason their levels need to be monitored and regulated in final wine products. Many of the current techniques for monitoring SO2 in wine require the SO2 to be separated from the wine prior to analysis. This investigation demonstrates a technique capable of measuring free sulfite concentrations in low volume liquid samples in white wine. This approach adapts a known colorimetric reaction to a suspended core optical fiber sensing platform, and exploits the interaction between guided light located within the fiber voids and a mixture of the wine sample and a colorimetric analyte. We have shown that this technique enables measurements to be made without dilution of the wine samples, thus paving the way towards real time in situ wine monitoring.
Keywords: Sulfur dioxide; potassium (sodium) metabisulfite; wine; microstructured optical fiber; sensors; wine sensing; pararosaniline
Rights: © 2012 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (
RMID: 0020121786
DOI: 10.3390/s120810759
Appears in Collections:Agriculture, Food and Wine publications
IPAS publications

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