Abstract:
Medium sweet and sweet
wines are obtained following a series of
technological processes. By deviating from
these processes and using various practices
against the laws in force, sweet wines are
likely to be adulterated. The detection of
sweet wine adulteration is achieved by
chemical polarimetric methods as well as by
the TLC-Thin Layer Chromatography
method. From the above mentioned methods
we chose to detect natural sugars by TLCThin
Layer Chromatography. In this paper
we present the results of a case study on a
lot of 16 samples, bought from the
supermarket, composed of DOC – CMD
medium sweet wines and table wines, bulk
wine and wines in PET bottles. The
objective of this study was to identify the
flaws of the method for the detection of
wine adulteration, and to find adulterated
medium sweet wines on the market.
Therefore, among the 16 studied wine
samples we found two counterfeited
medium sweet wine samples, in particular a
wine obtained by adding sucrose, pointed
out by a spot with an Rf of 0.125, specific
for the sucrose standard, and a medium
sweet wine obtained by adding an
unidentified natural sugar source, with Rf of
0.67.
