Antioxidant joint action of ascorbic acid (A1) and trolox (A2) on crocin oxidation.

Hypotheses of null interaction and synergy are compared, under the suppositions of independent action and concentration addition, through the fitting of the experimental results to the respective generalized models. Adj. r2: coefficient of multiple determination; res. sk.: residual skewness. See Figure 11 and text for details.