Standardization of Tragopogon graminifolius DC. Extract Based on Phenolic Compounds and Antioxidant Activity

Table 2

Phenolic compounds and antioxidant activity of T. graminifolius ethanolic extract in root and aerial part determined by HPLC.

Phenolic compound^1	Root extract	Aerial extract^2
Gallic acid	0.748±0.016	0.873±0.027
Catechin	2.067±0.021^∗	1.079±0.033^∗
Caffeic acid	0.135±0.006^∗	0.326±0.021^∗
𝜌-Coumaric acid	2.685±0.031^∗	6.357±0.014^∗
Ferulic acid	1.363±0.023^∗	1.24±0.018^∗
Antioxidant activity^3	460.45±0.78^∗	242.61±0.46^∗
Total phenol^4	292.34±13.67^∗	560.67±18.85^∗

1mg⋅g extract dry weight⁻¹.
²Results are expressed as means of three replicates ± S.D.
³µg Vit.E.E⋅mL⁻¹.
⁴mg⋅g⁻¹ as gallic acid equivalents.
*Values are significantly different (𝑡-test, 𝑃<0.05).