Table 9.
Correlation coefficient (r) between total polyphenol content, total flavonoid content and antioxidant activities of muffin added with aronia powder

	TPC1)	TFC2)	DPPH3)	MEC4)	REP5)
TPC	1	0.997**	0.927*	0.991**	0.981**
TFC		1	0.922**	0.993**	0.988**
DPPH			1	0.954**	0.901**
MEC				1	0.973**
REP					1

TPC : Total polyphenol content
TFC : Total flavonoid content
DPPH : DPPH radical scavenging activity
MEC : Metal chelating effect
REP : Reducing power