THE UTILIZATION OF A PIEZOELECTRIC QUARTZ-CRYSTAL FOR MEASURING CARBON-DIOXIDE IN WINE

A piezoelectric quartz crystal (PQC) is used for the quantification of carbon dioxide in still white wine. The methodology is discussed in t erms 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 m ethod. Standard deviations for several wine samples are, in the titrim etric method, between 4% and 12%, while using the PQC from 1% to 4%, f or wines containing 300-1000 mu g CO(2)cm(-3).