Profile of lipophilic and hydrophilic extracts from Feteasca neagră by-products

Abstract

Grapes grown in Republic of Moldova are widely used in the wine and juice industry, whereas, the functional compounds, recovered from wine by-products, are not fully exploited. After analyzing the seeds separated from fermented pomace of the local Feteasca Neagră (Black Maiden) grapes, grown on the vineyards of Nisporeni (FN), Hâncești (FH) and Speia village, Anenii-Noi (FS), in the season of 2020, the physico-chemical indicators as well as the content of the bioactive substances in lipophilic and hydrophilic extracts, were determined. The content of carotenoids and polyphenols, in lipophilic extracts, was determined by spectrophotometric methods. FN and FS oils have an increased carotenoid content, of 49.703 ±0.424 and 48.533 ±0.466 mg 100g of oil. The highest concentration of phenolic compounds was recorded for the FN oil, of 4.89± 0.05 mg GAE 100g of sample (which is approximately 0.005%). The oil quality indices were also determined.