Chemical and Bioactivity Evaluation of Eryngium planum and Cnicus benedictus Polyphenolic-Rich Extracts

Table 1

The active biological compounds content and antioxidant activity of extract fractions.

Medicinal herb	Fraction	TPC,	TFC,	DPPH,	Reducing power,
		mgGAE/mL	mgQE/mL	EC50, mg/mL	EC50, mg/L
E. planum	MF	0.749±0.062	0.176±0.014	0.316±0.034	0.209±0.020
	NF retentate	1.882±0.104	0.378±0.035	0.197±0.031	0.128±0.012
C. benedictus	MF	1.847±0.134	0.223±0.020	0.711±0.042	0.140±0.012
	NF retentate	2.659±0.128	0.478±0.045	0.0081±0.0005	0.082±0.006
Ascorbic acid				0.0012±0.0001	0.125±0.010

MF, microfiltration process; NF, nanofiltration process.
Antioxidant activity is expressed as half inhibitory concentration (EC₅₀); values are expressed as mean ± standard deviation of three measurements.