In the
studied samples notations P, H and O were used to indicate preharvest,
harvest and over-ripening respectively. Thirty clusters
were collected at each stage and their grapes were sorted according
to their density. The density of grapes was estimated by flotation
of berries in different NaCl solutions (130–150, 150–170, and
170–190 g L1) corresponding to different solids contents (22, 24
and 26 Brix, respectively)