ELECTROCHEMICAL METHOD FOR SULFITE DETERMINATION IN WINES BY ELECTROCHEMICAL RESPONSE USING A MEMBRANE ABSORBER SYSTEM
| Autor: | Carla Báez, Julio Romero, Roxana Arce, J. P Muena, María J. Aguirre |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
ripper method
Calibration curve aspiration method electrooxidation 02 engineering and technology Electrolyte Electrochemistry 01 natural sciences wines chemistry.chemical_compound sulfite Sulfite Wine Chromatography membrane contactor 010401 analytical chemistry digestive oral and skin physiology food and beverages General Chemistry Repeatability 021001 nanoscience & nanotechnology 0104 chemical sciences Membrane chemistry Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Journal of the Chilean Chemical Society, Volume: 61, Issue: 4, Pages: 3206-3210, Published: DEC 2016 Journal of the Chilean Chemical Society v.61 n.4 2016 SciELO Chile CONICYT Chile instacron:CONICYT Scopus-Elsevier |
| Popis: | This research demonstrates how the sulfite content can be measured by cyclic voltammetry using a previously reported membrane absorber system, which separates efficiently sulfite present in wine. Results obtained show notably similar values to those obtained for the same wine samples using modified Monier- Williams method (aspiration method) and Ripper method. The membrane absorber system allows the release of the free SO2, and can be used to determine the sulfur dioxide present in juices and other foods that contain high concentrations of phenols, polyphenols and other structurally related compounds that act as interferers in the electrochemical oxidation of sulfite. The absorber solution allows a direct measurement without change in pH or added electrolyte, facilitating the determination of great amounts of samples from diverse wines using only one calibration curve. In this way, a system that allows the detection of sulfite and that can be used in vineyards is obtained. Finally, the method was assessed on linearity, sensitivity, accuracy, reproducibility and repeatability, obtaining values that account for the applicability of the method. |
| Databáze: | OpenAIRE |
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