Öz
In this study, the effects of sub and supercritical fluid extraction methods on the chemical composition and antioxidant activity of annual wormwood (Artemisia annua L.) which is important medicinal aromatic plants were investigated. The applied sub/supercritical fluid extractions were subcritical water, subcritical ethanol and supercritical CO2. The efficiency of these methods has been compared by using steam distillation, refluxing and organic solvent extraction in an ultrasonic bath. Free radical scavenging method (DPPH), total antioxidant capacity (CUPRAC) and total phenol content (FOLIN) methods were conducted to determine the antioxidant activities of the extracts. The results revealed that the components and concentrations in the extracts varied according to the extraction method. Taking advantage of this difference, the extraction method suitable for the purpose of use of the extract can be selected. Economically important oxygenated components were mostly obtained by subcritical water extraction. It was determined that the most effective method in antioxidant activity determination studies was subcritical ethyl alcohol extraction. It is thought that the results obtained will make an important contribution to the pharmacology, food and nutraceuticals industries.