Abstract:
The efficiency of the methods of extraction of the vegetal principles is
enssured by the relation extraction agent/vegetal mass, temperature, the
number of extraction phases, pH, the size of the vegetal materil particles,
performance rating.In the present study, two extractive methods were tested,
the discontinuous shaking extracting method and Soxhlet continuous
extractive method. In the first case the extractive process was followed
durind its dynamic course for 24 hours. In order for the mentioned extractive
methods to be assessed, the obtained vegetal extracts were analyzed to
determine the total polyphenol content (g GAE/L) and the index of tannoid
matters (ITM). As a vegetal material, Vitis vinifera seeds were used, from the
varieties Cabernet Sauvignon, Merlot, Băbească neagră and Fetească
neagră.
The purposes were to select the most efficient metho for the extraction
of total polyphenolic compounds, and to select the vegetal material with the
highest content of tatal polyphenolic compounds.\
The importance of the studies regarding the grape polyphenols is the
evaluation of the enological potential of the different varietiess of vines, as
well as the evaluation of thei properties benefic for healthcare, due to their
anti-oxidant, anti-neoplastic and anti-inflammatory actions. The richest
vegetal extracts as to the total polyphenols, tanoid matter and anthocyns
content were obtained from Băbească neagră and Merlot grape seed by
using both extractive methods.
