Some physicochemical properties, fatty acid composition and antimicrobial characteristics of different cold-pressed oils

Since the demand for organic food in the field of vegetable oils is increasing, consumers tend to look for products that haven't been produced by extracting oils from seeds by using solvents such as hexane, or having undergone chemical refining processes. To consumers looking for oils that can enhance human health and prevent certain diseases, cold-pressed oils are the alternative product, The interest in cold-pressed oils is constantly growing. Moreover, some cold-pressed vegetable oils may present antimicrobial activities and might thus provide a natural way to reduce pathogens on fresh products. This study aims to determine the physicochemical properties, fatty acid compositions and antimicrobial characteristics of cold-pressed argan, pomegranate, date, flax, safflower, golden berry, walnut, and grape seed oils. The cold-pressed date and flax seed oils analyzed showed the lowest acid value (0.30 mg KOH/g) and peroxide value (1.4 meqO(2)/kg) respectively. Gas Chromatography analysis of fatty acid methyl esters indicated that the dominant fatty acid of argan, golden berry and flax seed oils were oleic (53.41%), linoleic (74.92%) and linolenic acids (56.25%) respectively (p