Phenolic acid compositions determined by RP-HPLC of a PNPM b BGPL c KMPL d CMPM e WMPL and f BB fibre samples at 254 nm. PNPM pineapple pomace, BGPL Burmese grape peel, KMPL Khasi mandarin peel, CMPM carambola pomace, WMPL watermelon, BB banana blossom. Footnote: 1- gallic acid; 2- catechin; 3- chlorogenic acid; 4- caffeic acid; 5- syringic acid; 6- ferulic acid; 7- coumaric acid; 8- rutin hydrate and 9- quercetin