Abstract
Wine is a product of the yeast fermentation of the naturally present sugars in grape juice [1]. The chemical composition of wine is very variable and complex. The acidic compounds, besides the effect that they can have in the colour, the taste and the stability of finished wines, are responsible for keeping the wine microbiologically and chemically stable. Therefore, the determination of titratable acidity in wine has become a routine procedure determining wine character and quality [2]. In this context, a microfluidic flow-based system has been developed for the automation of a methodology for the determination of titratable acidity in wine. In the proposed system, a precise volume of sample is mixed with a buffered bromothymol blue (BTB) solution, leading to a change on the absorbance of the solution. This change in absorbance can be monitored at 607 nm by a home-made miniaturized optical detection system, and it can be related with the titratable acidity of the sample. The hydrodynamic conditions for the microsystem were evaluated and optimized, and the system was used for the determination of the titratable acidity of different wine samples with less than 5% error when compared to the official analysis method of the Association of Official Analytical Chemists [3].
| Original language | English |
|---|---|
| Title of host publication | Book of abstracts Analítica 2018 |
| Subtitle of host publication | 9th Meeting of Division of Analytical Chemistry |
| Editors | Marcela A. Segundo, Eduarda M. P. Silva, Luísa Barreiros, Lúcia Saraiva |
| Publisher | Sociedade Portuguesa de Química |
| Pages | 87-87 |
| Number of pages | 1 |
| ISBN (Print) | 9789898124210 |
| Publication status | Published - Mar 2018 |
| Event | Analítica 2018: 9th Meeting of the Analytical Chemistry Division - Universidade do Porto, Porto, Portugal Duration: 26 Mar 2018 → 27 Mar 2018 |
Conference
| Conference | Analítica 2018 |
|---|---|
| Country/Territory | Portugal |
| City | Porto |
| Period | 26/03/18 → 27/03/18 |