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Sensing free sulfur dioxide in wine.
Monro, Tanya M; Moore, Rachel L; Nguyen, Mai-Chi; Ebendorff-Heidepriem, Heike; Skouroumounis, George K; Elsey, Gordon M; Taylor, Dennis K.
Afiliação
  • Monro TM; Institute for Photonics & Advanced Sensing and School of Chemistry & Physics, The University of Adelaide, Adelaide, SA 5005, Australia. tanya.monro@adelaide.edu.au
Sensors (Basel) ; 12(8): 10759-73, 2012.
Article em En | MEDLINE | ID: mdl-23112627
ABSTRACT
Sulfur dioxide (SO(2)) is important in the winemaking process as it aids in preventing microbial growth and the oxidation of wine. These processes and others consume the SO(2) over time, resulting in wines with little SO(2) protection. Furthermore, SO(2) 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 SO(2) in wine require the SO(2) 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.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Sulfitos / Dióxido de Enxofre / Vinho Idioma: En Ano de publicação: 2012 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Sulfitos / Dióxido de Enxofre / Vinho Idioma: En Ano de publicação: 2012 Tipo de documento: Article