The importance of juice beverages in daily food habits
makes juice authentication an important issue, for
example, to avoid fraudulent practices.
A successful classification model should address two
important cornerstones of the quality control of juicebased
beverages: to monitor the amount of juice and
to monitor the amount (and nature) of other substances
added to the beverages. Particularly, sugar addition is
a common and simple adulteration, though difficult to
characterize. Other adulteration methods, either alone
or combined, include addition of water, pulp wash, cheaper juices, colorants, and other undeclared additives
(intended to mimic the compositional profiles of pure
juices) (Saavedra, García, & Barbas, 2000).