Ferulic was the most abundant phenolic acid in red cashew
peel; while gallic acid and ellagic acid were the predominant phenolic
acids in purple star apple peel and myricetin and sinapic acid
were the most abundant phenolic compounds in yellow cashew
peel. Caffeic acid and sinapic acid were not detected in the purple
star apple peel. These phenolic compounds found in the freezedried
peel from tropical fruits were also identified in gac fruit peel,
pomegranate fruit peel and pineapple peel (Kubola &
Siriamornpun, 2011; Middha, Usha, & Pande, 2013; Yi, Wei, Teng,
& Gao, 2006).