Table 5
Radical scavenging activities (IC50s)of the ethanol extracts and their organic solvent fractions of Arctium lappa L

Samples/Chemicals	Extract/fr.1)	Radical scavenging activity: IC50(µg/mL→mL)
		DPPH	ABTS	Nitrite
		Samples	Ethanol extract	>500	>500	>100
n-Hexane fr.	>500		>500	>100
Ethylacetate fr.	51.6		17.8	26.6
Butanol fr.	472.4		255.4	>100
Water residue	>500		>500	>100
Vitamin C	-	15.2	5.3	15.8

ffraction