Antioxidant Activity of Agastache rugosa and Pogostemon cablin

Abstract:

Objective: To evaluate the antioxidant activity of extracts from Pogostemon cablin and Agastache rugosa. Method: Their antioxidant activity was evaluated and compared using 1,1-diphenyl-2-picrylhydrazyl radical 2,2-diphenyl-1-(2,4,6-trinitrophenyl) hydrazyl (DPPH) free radical scavenging, 2,2'-amino-di(2-ethyl-benzothiazoline sulphonic acid-6) ammonium salt (ABTS) and ferric reducing antioxidant power (FRAP) assay. Result: There was some correlation for antioxidant capacity between the total polyphenol and total flavonoid contents (r=0.6099). The ethyl acetate of P. cablin showed the strongest capacity of DPPH scavenging[IC₅₀(79.60±3.14) mg· L^-1], the ethyl acetate of A. rugosa showed the strongest capacity of ABTS scavenging[IC₅₀(4.41±0.23) mg· L^-1], and the petroleum ether of P. cablin had the strongest capacity of FRAP[TEAC(1 822.99±1 141.13) μmol· g^-1]. Conclusion: They all had certain antioxidant effects and small differences were found between P. cablin and A. rugosa.