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Resumo(s)
O 2,4,6-tricoloroanisol (TCA) é um contaminante ocorrente nas rolhas de cortiça que
prejudica as propriedades sensoriais de vinho engarrafado, levando a perdas económicas
significativas.
Como parte de um esforço tecnológico transversal à indústria na resolução deste pro-
blema, a Amorim Cork utiliza o sistema NDtech para aplicar industrialmente técnicas
cromatográficas de forma a efetuar análises rolha-a-rolha da concentração de TCA liber-
tável.
Com os algoritmos de classificação atuais, 99,96% das rolhas classificadas como TCA
negativas apresentam valores abaixo de 0,5 ng/L quando analisado o headspace da respe-
tiva maceração. Embora este valor seja bastante significativo, é obtido também à custa de
rejeição de rolhas numa proporção superior à desejável.
Pretende-se com este trabalho o desenvolvimento de um novo algoritmo, com os
objetivos de diminuir os erros de classificação das rolhas e a dependência de fatores de
decisão humana.
2,4,6-Trichloroanisole (TCA) is a naturally occurring contaminant in both cork and cork stoppers which, despite being non-toxic, its presence ravages the smell and taste of wine, leading to considerable economic losses. As part of an industrywide effort towards the solution of this problem, Amorim Cork uses NDtech to apply chromatographic techniques for individual screening of every stop- per’s releasable TCA quantity. With the current classification techniques, 99,96% of all corks have non-detectable ammounts of TCA (under 0,5 ng/L when undergone maceration and headspace analysis). Despite that, these results are obtained in a way that a substancial ammount of stoppers is rejected in this process. The aim of this work is to reduce both the classification error of the current algorithms, especially in the case of higher quality stoppers and human-related classification errors.
2,4,6-Trichloroanisole (TCA) is a naturally occurring contaminant in both cork and cork stoppers which, despite being non-toxic, its presence ravages the smell and taste of wine, leading to considerable economic losses. As part of an industrywide effort towards the solution of this problem, Amorim Cork uses NDtech to apply chromatographic techniques for individual screening of every stop- per’s releasable TCA quantity. With the current classification techniques, 99,96% of all corks have non-detectable ammounts of TCA (under 0,5 ng/L when undergone maceration and headspace analysis). Despite that, these results are obtained in a way that a substancial ammount of stoppers is rejected in this process. The aim of this work is to reduce both the classification error of the current algorithms, especially in the case of higher quality stoppers and human-related classification errors.
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Rolhas de cortiça 2,4,6-tricoloroanisol Análise de sinal NDtech
