The Comparison of the Quality Properties of Some Commercial Cold Pressed Seed Oils

Abstract

In this study, it is aimed to define the properties which determine their effects on the quality and health of five different kinds of seed oils produced by the cold pressed extraction method. The cold pressed seed oils known as coffee bean, pomegranate, cherry, apricot, and fig kernels which are produced in the domestic market of Turkey were bought to determine the quality characteristics such as peroxide values, free fatty acidity, and UV-specific absorption values, total phenolic compounds and antioxidant activity of these seed oils. When the peroxide values were examined, the highest peroxide value was found in coffee bean oil and the lowest peroxide value was found in pomegranate seed oil. When the free fatty acidity is considered, the number of free fatty acids is ranked from the highest to the lowest as coffee bean oil, fig kernel oil, sour cherry seed oil, pomegranate seed oil, and apricot kernel oil. The K₂₃₂ value was found to be the highest in coffee bean oil while it was the lowest in apricot kernel oil. K₂₇₀ values were the highest in pomegranate seed and the lowest in the apricot kernel. As seen in the results of the total phenolic compound analysis performed to recognize the effects on health, this value was highest in coffee bean oil, followed by apricot kernel oil, fig kernel oil, pomegranate seed oil, and sour cherry seed oil. When the results antioxidant activity analysis were examined, the antioxidant activity of apricot kernel oil was found to be the lowest, while this value of fig kernel oil was found to be the highest. According to the analysis of variance, these differences were statistically found to be significant. In addition, these values were compared with the studies in the literature and evaluated according to the legal limits. These products sold on the grounds that they have beneficial effects on health in the market should be implemented with more stringent procedures to be audited by public institutions and legal regulations should be supported by further scientific studies.

Keywords

• cold pressed,seed oil,total phenolic content

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