3.1.3. Phenolic profile by HPLC-DAD analysis
Besides tannins, flavonoids accounted for the majority of compounds identified, mainly catechin (360 mg/100 g), quercetin (90 mg/100 g) and epicatechin (6 mg/100 g). Catechins were reported to exert lipoxygenase inhibitory action in mackerel (Banerjee, 2006). Medina et al. (2007) evaluated the antioxidant effectiveness of catechins in minced fish muscle, finding catechin as the most efficient among the catechins studied. Among benzoic acids, 136 mg/100 g corresponded to gallic acid,also previously found in carob pulp kibbles (Roseiro et al., 2013). Other phenolic compounds present in CSP included flavones, such as a luteolin derivative (229 mg/100 g). Comparison of the CSP phenolic composition with other studies on carob was difficult due to differences in extraction methods and not previously reported CSP characterisation.