Effect of Kelussia Odoratissima Mozaffarian leaves essential oil on the oxidative stability of soybean oil

Kelussia odoratissima Mozaffarian is regarded as one of the medical plants to reduce blood pressure, treat rheumatic and nervous system diseases, prevent kidney and bladder stone formation and clean the urethra. In this study, total phenolic content of essential oil extracted from Kelussia odoratissima Mozaffarian leaves were measured. Antioxidant activity of the essential oil at 10-100 ppm were investigated using DPPH radical-scavenging activity, reducing power assay, β-carotene bleaching assay and total antioxidant capacity and accordingly compared with synthetic antioxidant namely BHA. The most of antioxidant capacity in sum were related to the 100 ppm of the essential oil and BHA. Also, the effect of the essential oil on oxidative stability of soybean oil was assessed using peroxide value and thiobarbitoric acid index. Results showed that oxidation inhibited during storage with 100 ppm concentration of the essential oil which was the most effective to inhibit the oxidation and could be used instead of BHA.