The pinene-to-five principal components ratio in Schinus molle L. essential oil as an antioxidant activity indicator

Abstract

The objective of this study is to establish an indicator based on pinene content (α and β) for identifying Schinus molle and relate it to its antioxidant activity. Composition of Schinus molle essential oil (SEO) was analysed using gas chromatography and its thermal stability over a 14-day period at 60 °C. Antioxidant activity was evaluated with indirect measurement via Free Radical Scavenging Activity (FRSA-DDPH) and Total Phenolic Content and direct analysis by monitoring accelerated oxidation in sunflower oil over 14 days at 60 °C. Chemical, volatile, and sensory indicators of oxidation was measured. BHT was included as control antioxidant and SEO at 0.02 %, 0.10 % and 0.20 % w/w. SEO has no dose/response correlation between 0.10 and 0.20 % w/w. SEO demonstrated antioxidant properties, with the "pinene content to five main compounds" ratio, yielding a value of 0.39. Notably, ratios exceeding 0.10 were associated with the highest antioxidant activity, indicating potential industrial applications.

Keywords: Antioxidant activity; Lipid oxidation; Pinenes ratio; Sensory attributes; Thermal stability.