Monitoring of beverage quality and freshness is of increasing
interest for both the consumer and the beverage industry. Fruit
juices have been attracting a great deal of attention because of
its relevance to the beverage industry. It is greatly appreciated by
the consumer, due to its nutritional and sensory properties. Since
consumer awareness has been heightened in all aspects related
to food quality, quality has become an issue of major importance.
A customer’s decision to choose a juice is based largely on their
personal preference. It seems logical then, to analyse these prefer-
ences, in terms of differences/quality, and to develop devices that
are capable of perceiving them. E-Nose and e-Tongue have widely
been suggested for the monitoring of beverage quality. Both de-
vices consist in arrays of non-selective gas or liquid sensors with