Salvia ceratophylla from Jordan: Volatile Organic Compounds, Essential oil composition and antioxidant activity

This work aimed at evaluating the chemical composition of the hydro-distilled essential oils of fresh and air-dried salvia ceratophylla growing wild in jordan by gc/ms in addition to evaluating the actual composition of the volatile organic compounds (voc’s) extracted by spme (solid phase micro-extraction) of s. certaphylla fresh roots and flowers at the pre-, full and postflowering stages. different classes of terpenoids at varying concentrations were detected. the hydro-distilled oil of fresh flowers was dominated by sesquiterpene hydrocarbons (27.26%) while the air dried flowers contained oxygenated monoterpenes as the main constituents (58.28%). the voc’s profile of the roots and the flowers during the pre-, full and post-flowering stages contained monoterpene hydrocarbons as the main constituents (60.14%; 80.49%; 92.28%; 59.66%, respectively). in addition, the hydro-alcoholic extracts obtained from the aerial flowering parts of s. ceratophylla showed interesting antioxidant activity on abts^+ assay (ic50=0.09 (mg/ml) ± 2.91) as compared to that of the dpph assay (ic50=0.11 (mg/ml) ± 1.85).