Comparison of the quality properties of some commercial cold pressed seed oils

Abstract

In this study, the aim is to explain some quality properties of five different kinds of seed oils produced by the cold pressed extraction method. Coffee bean, pomegranate seed, cherry seed, apricot seed, and fig kernel cold pressed oils that are produced in the domestic market of Turkey were evaluated in terms of their some quality characteristics such as peroxide values, free fatty acidity, and UV-specific extinction values, total phenolic compounds and antioxidant activity. The highest levels of peroxide values and free fatty acid values were determined in coffee bean oil with abundances of 26.34 mEqO2/kg oil and 2.07 mg KOH/g oil, respectively. Coffee bean oil also had relatively high UV-specific extinction values (K232 values 4.04 and K270 values 3.99). In the results of the total phenolic compound analysis performed to recognize the effects on health, this value was highest in coffee bean oil, with 1380 mg GAE/L oil. The results of the highest antioxidant activity were examined in the fig kernel oil. These values were compared with the studies in the literature and evaluated according to the legal boundaries.