Research Article

Optimization of Ultrasonic Extraction of Phenolic Compounds from Epimedium brevicornum Maxim Using Response Surface Methodology and Evaluation of Its Antioxidant Activities In Vitro

Table 2

Correlation between total phenolic content (TPC), DPPH radical scavenging ability (DPPH), and ferric-reducing antioxidant power (FRAP).

DPPHFRAPTPC

DPPH0.8120.913
FRAP0.8120.793
TPC0.9130.793