Abstract
In this study, fatty acids, tocopherol contents, and phenolic compounds of the grape seed oils obtained with cold-pressed and soxhlet extraction systems from several grape seeds were investigated. Linoleic acid contents of cold-pressed oils varied between 59.61 and 72.13%. In addition, linoleic acid contents of oils obtained with soxhlet system changed between 58.51 and 71.17%. While gamma-tocotrienol contents of oil samples extracted with cold-pressed change between 13.21 and 34.71mg/100g, gamma-tocotrienol contents of oils obtained by soxhlet system in all grape varieties varied between 8.89 and 33.89mg/100g. In addition, while gamma-tocotrienol contents of cold-pressed oils range from 15.47 to 39.95mg/100g, gamma-tocotrienol contents of soxhlet extraction oils in all grape varieties were determined between 13.47 and 35.75 mg/100 g. Both systems' oils are rich in catechin, gallic acid, and chlorogenic acid. While catechin contents of cold-pressed oils change between 427.80 and 847.14 mg/kg, catechin contents of soxhlet extraction oils in all grape seeds ranged from 537.11 to 836.88 mg/kg.