This work focused on studying the mechanism of contamination of wine with 2,4,6-trichloroanisole (2,4,6-TCA) from microaglomerated corks, and the feasibility study of the implementation of the method of analysis of 2-methoxy-3,5-dimethylpyrazine (MDMP) by SPME-GC/MS. The first study examined the relationship between the levels of contamination with 2,4,6-TCA from the microaglomerated corks of several batches (measured in terms of group analysis) and the level of contamination with 2,4,6-TCA (measured in terms of individual analysis) found in wine sealed with corks of the same batch. The method used in this study to quantify 2,4,6-TCA was SPME-GC-MS. After 3 months, it was observed that the levels of contamination with 2,4,6-TCA from wine were identical to those found on the surface of the cork in contact with wine, this contamination occurred relatively quickly and did not appear to increase over time. Levels of 2,4,6-TCA contamination found in bottled wine are relatively proportional to the levels of contamination with 2,4,6-TCA from cork lots used in the experiment. The second study was to develop the method of analysis of MDMP based on existing literature on the subject and to implement the conditions present in this literature in SPME-GC-MS. The method of analysis of the said compound was optimized, however with a quantification limit much higher than the detection limit of the same sensory compound in wine.
Date of Award | 2012 |
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Original language | Portuguese |
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Awarding Institution | - Universidade Católica Portuguesa
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Supervisor | Miguel Cabral (Supervisor) |
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- Microagglomerated cork
- 2,4,6-trichloroanisole
- Wine
- 2-methoxy-3,5-dimethylpyrazine
- Mestrado em Engenharia Alimentar
Migração de 2,4,6-TCA através de rolhas neutrocork para um vinho e implementação do método de análise para MDMP
Vasconcelos, B. C. D. (Student). 2012
Student thesis: Master's Thesis