2.4 Antioxidant activity
The antioxidant activity was determined for the extracts of black pepper obtained by SFE at 150, 200
and 300 bar; 313.15 K, 323.15 K, and by SOX and UE methods. The results were compared with the
synthetic compound BHT (butylated hydroxytoluene). All reagents used in the antioxidant activity
analysis were purchased from Sigma–Aldrich Co. (USA).