Phenolic Contents and Antioxidant Potential of Crataegus Fruits Grown in Tunisia as Determined by DPPH, FRAP, and β-Carotene/Linoleic Acid Assay

Table 3

Linear correlation of Trolox equivalent antioxidant capacity (TEAC) versus the total phenolic content of crataegus fruit extract.

Variety	Phenolic contents	Correlation coefficients
		TEACDPPH	TEACFRAP
C.  monogyna	TP	𝑦=2.5328𝑥+424.06; 𝑅^2=0.9856	𝑦=0.0245𝑥+4.2986; 𝑅^2=0.3249
	TF	𝑦=2.1267𝑥+347.53; 𝑅^2=0.9412	𝑦=0.0305𝑥+2.054; 𝑅^2=0.6819
	PC	𝑦=0.3507𝑥+461.84; 𝑅^2=0.5885	𝑦=0.0076𝑥+2.1564; 𝑅^2=0.9783
C.  azarolus	TP	𝑦=14.884𝑥−307.64; 𝑅^2=0.983	𝑦=0.0707𝑥+1.8527; 𝑅^2=1
	TF	𝑦=3.6082𝑥+249.36; 𝑅^2=0.9094	𝑦=0.0162𝑥+4.5682; 𝑅^2=0.8267
	PC	𝑦=1.9996𝑥+32.668; 𝑅^2=0.9666	𝑦=0.0096𝑥+3.4515; 𝑅^2=0.9964

TP: Total polyphenols.
TF: Total flavonoids.
PC: Proanthocyanidin content.