CRISTINA MIHAELA NICOLESCU, MARIUS BUMBAC, RADU LUCIAN OLTEANU, GEORGETA-CARMEN ALECU (HOLBAN), DOINA-NICOLETA BOBOACA-MIHAESCU, CEZARINA NECULA, CRISTIANA RADULESCU
Chemical compounds from plant extracts offer unlimited opportunities as cosmetic additives due to their availability and chemical diversity. Increasing demand for chemical compounds from different classes made the plant extracts, edible plant extracts in particular, useful for cosmetic products. The profile of bioactive compounds contained by the so-called natural cosmetic products may be different according to the characteristics of the plant extracts used in their fabrication processes. The study proposes a comparative analysis of several characteristics of grape extracts obtained by solid-liquid extraction, using water as solvent, with and without ultrasonation. Extracts obtained from four red grape varieties harvested at maturity from two types of vineyards, ecological and traditional, were analyzed. Total flavonoid contents, pH and conductivity were measured; correlations of these properties with extraction method, grape variety and vineyard type were envisaged as well. It was concluded that slight differences may occur in extracts aciditiy and conductivity of studied red grape extracts, as well as in the total flavonoids contents, and that the use of the ultrasound power during the applied extraction procedures does not have a significant influence. The vineyards type however showed some influence on the studied extracts properties.
red grapes, skin extract, total flavonoids content, acidity, conductivity, FTIR, UV-VIS.
201-208