STUDY ON CHEMICAL COMPOSITION AND ANTIOXIDANT ACTIVITY OF ESSENTIAL OIL FROM Elsholtzia winitiana var. dongvanensis Phuong

Abstract

This study aimed to evaluate the yield, physicochemical properties, chemical composition, and antioxidant activity of essential oil extracted from Elsholtzia winitiana harvested in Ta Lung commune, Dong Van district, Ha Giang province. The results showed that the extraction yield of Elsholtzia winitiana essential oil reached 0.5% (based on fresh sample weight) and the main components of the essential oil were dehydroelsholtzia ketone (59.52%), caryophyllene (13.06%) and D-limonene (7.52%). The antioxidant activity test results for reducing power, total antioxidant activity, and DPPH radical scavenging capacity showed EC₅₀ values of 93.20, 257.5, and 28.07 µg/mL, respectively. This study has contributed to supplementing the scientific database on the chemical composition and antioxidant capacity of Elsholtzia winitiana harvested in Ha Giang province.