Autor(es): Gomes, MT ; Duarte, A C ; Oliveira, JP
Data: 1996
Identificador Persistente: http://hdl.handle.net/10773/6819
Origem: RIA - Repositório Institucional da Universidade de Aveiro
Assunto(s): Piezoelectric quartz crystal; Piezoelectric crystals; Carbon dioxide; Wine
A piezoelectric quartz crystal (PQC) is used for the quantification of carbon dioxide in still white wine. The methodology is discussed in terms of calibration stability and accuracy as a direct consequence of coating amount and absolute quantity of carbon dioxide in the samples. The method is compared, in terms of precision, with the titrimetric method. Standard deviations for several wine samples are, in the titrimetric method, between 4% and 12%, while using the PQC from 1% to 4%, for wines containing 300-1000 mu g CO(2)cm(-3).
