Antioxidant Activities and Phenolic Compounds of Extract from Hallasan Wormwood

Abstract

Background: Many Artemisia species are used in traditional medicine to treat gastrointestinal disorders and various other ailments. However, the antioxidant and phenolic compounds present in Hallasan wormwood (Artemisia japonica var. hallaisanensis) have not been investigated yet. Methods and Results: Extracts of Hallasan wormwood (aerial parts and roots) were extracted using methanol and sequentially treated with solvent-solvent fractionation using n-hexane, ethyl acetate, and water-saturated butanol, to yield fractions with variations in polarity. The phenolic compounds present in the extracts and fractions were determined using high performance liquid chromatography (HPLC) and colorimetry. The antioxidant activities were determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, trolox equivalent antioxidant capacity (TEAC), ferric reducing antioxidant power (FRAP), and oxygen radical antioxidant capacity (ORAC) methods. The results revealed that the ethyl acetate fraction had high total phenolic and total flavonoid contents. Furthermore, the ethyl acetate fraction of roots showed the highest antioxidant activity. Conclusions: Metanolic extracts from the roots and aerial parts of Hallasan wormwood showed different antioxidant activities; nine phenolic acids and one flavonoid were detected in Hallasan wormwood. Thus, the finding of this study provide valuable data for research on functional substances from plants.

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