Table 1.

Total phenols, proanthocyanidins and antioxidant activity of lyophilized PP extracts obtained by ultrasonic extraction (UE), Soxhlet extraction (SE), and cold maceration (CM).

Extraction Method	Solvent	Total Phenols [mg GAE/g]	Proanthocyanidins [mg PAC/g]	Antioxidant Activity [% inhibition]
UE	MeOH	25.92 ± 0.13	3.71 ± 0.08	91.92 ± 1.01
	EtOH	25.41 ± 0.22	2.58 ± 0.04	90.12 ± 2.20
	Ace	24.50 ± 0.11	3.54 ± 0.02	90.50 ± 3.21
SE	MeOH	40.55 ± 0.23	4.47 ± 0.06	93.33 ± 1.55
	EtOH	40.33 ± 0.43	3.26 ± 0.02	91.50 ± 2.18
	Ace	39.26 ± 0.61	2.47 ± 0.03	91.08 ± 1.14
CM	MeOH	42.92 ± 0.65	4.88 ± 0.07	94.35 ± 1.31
	EtOH	40.89 ± 0.81	5.37 ± 0.02	90.97 ± 1.24
	Ace	40.19 ± 0.41	5.82 ± 0.02	91.30 ± 1.52

Total phenols expressed as mg GAE/g extract. Proanthocyanidins expressed as mg PAC/g extract. Antioxidant activity expressed as % of DPPH inhibition. All experiments were conducted in triplicates and results are reported as a mean ± SD.