Volatiles composition and antioxidant activity Inula oculus-christi L. from Serbia

Abstract

The chemical composition of the essential oil and the volatiles obtained by static headspace (HS) of Inula oculus-christi L. is presented. The GC-MS analysis of the hydrodistilled oil resulted in the identification of 90 components, representing 92.7% of the oil. The most abundant compounds were: caryophyllene oxide (9.8%), trans-longipinocarveol (9.2%), eucalyptol (7.3%) and intermedeol (6.2%). The major constituent of I. oculus-christi L. HS volatiles was eucalyptol (87.4 %). The antioxidant activity was evaluated by four different methods: 2,2-diphenyl-1-picryl-hydrazylhydrate free radical assay (DPPH), 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) method, total reducing power (TRP), ferric reducing antioxidant power (FRAP), and cupric reducing antioxidant capacity (CUPRAC). Total phenolic content in (TPC) examined oil was 177.95 µg GAE/mg oil. Radical scavenging potential of the oil was promising RSC-DPPH was 57.4% and RSC-ABTS was 82.7%.

Antioxidant, Antimicrobial, and Insecticidal Properties of a Chemically Characterized Essential Oil from the Leaves of Dittrichia viscosa L.

“…Alternatively, when the FRAP assay was used to evaluate the ability of the EO to transform ferric iron Fe 3+ to ferrous iron Fe 2+ [ 53 ], moderate antioxidant activity (EC 50 = 3.7 × 10 2 ± 2.5 mg/mL), compared to BHT (EC 50 = 1.3 ± 0.2 mg/mL) and ascorbic acid (EC 50 = 0.76 ± 0.1 mg/mL), was observed ( Table 2 ). The results of another study that was performed on the antioxidant activity of a D. viscosa EO using the FRAP assay found a reducing capacity of 24 mg Fe/mg oil [ 54 ].…”