Optimisation of phenolic compounds and antioxidant activity extraction conditions of a roasted mix of <i>Tetrapleura tetraptera</i> (Schumach & Thonn.) and <i>Aframomum citratum</i> (C. Pereira) fruits using response surface methodology (RSM).

The regression models were highly significant ( df: 9; F-value: 80.78; p < 0.0001 for TPP and df: 9F-value: 266.05; p < 0.0001 for TAC) and linear ( df: 3; F-value: 5.68; p < 0.02 for TPP and df: 3; F-value: 6.55; p < 0.02 for TAC), quadratic ( df: 3; F-value: 229.76; p < 0.0001 for TPP and df: 3; F-value: 750.99; p < 0.0001 for TAC) and interaction ( df: 3; F-value: 6.91; p < 0.01 for TPP and df: 3; F-value: 40.62; p < 0.0001 for TAC) parameters were significant for the two responses.

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