Composition and Characterization of Water Extractable Pectin from Pulp in Pods of Riang (Parkia timoriana (DC.) Merr.)

Supaporn Apirattananusorn, Jitkasame Lumsa-Ed, Sunanta Tongta, Kuakoon Piyachomkwan
2022 Trends in Sciences  
The purpose of this study was to preliminary investigate the extraction condition and composition of purified pectin from pulp in pods of Riang (Parkia timoriana (DC.) Merr.), a native tree in southern Thailand. Dry pulp of Riang was extracted using water or citric solvent at different concentrations under the same condition (90 ℃ for 2 h). It was found that the highest yield of pectin (21.6 % dry basis) was obtained by hot water extraction with an esterification degree of 48.3 %. It mainly
more » ... ained 62.3 % galacturonic acid, followed by 18.5 % total sugar. The monosaccharides found in pectin were arabinose (2.6 %), galactose (2.3 %), glucose (1.5 %), mannose (0.5 %), fructose (0.5 %) and xylose (0.1 %). The finding pectin had a high average molecular weight of 2,070 KDa with a broad polydispersity index of 4.31, determined by high performance size exclusion chromatography (HPSEC) and it was classified as low methoxyl pectin confirmed by Fourier transform infrared spectroscopy (FT-IR) and rheological properties. HIGHLIGHTS Pectin from Riang pulp was low methoxyl pectin This pectin was water extractable and showed a high yield of 21.6 % (dry basis) It had high molecular weight with broad polydispersity index. GRAPHICAL ABSTRACT
doi:10.48048/tis.2022.4480 fatcat:4r4uwijvcfdddlkek4ymd7ptg4