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Pectin recovery from apple pomace: physico‐chemical and functional variation based on methyl‐esterification
Author(s) -
Naqash Farah,
Masoodi F. A.,
Gani Adil,
Nazir Sadaf,
Jhan Faiza
Publication year - 2021
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.15129
Subject(s) - pectin , pomace , polysaccharide , chemistry , food science , solubility , emulsion , valorisation , pea protein , chromatography , biochemistry , organic chemistry , economics , market economy
Summary This study explored the valorisation of apple pomace by extracting pectin with both high and low degrees of esterification (DM). Two types of pectin were extracted with a DM of 43.29% being low methoxyl (LM) pectic polysaccharide and high methoxyl (HM) pectin with a DM of 65.88%. HM pectin was characterised by a WHC and OHC of 1.3 g g −1 and 0.4 g g −1 , respectively, compared to 0.32 g g −1 and 0.14 g g −1 , respectively, for LM pectic polysaccharide. HM pectin possessed greater purity indicated by 69.18% GalA, whereas LM pectic polysaccharide possessed 41.26% GalA. HM pectin revealed better functionality in terms of high emulsifying activity which was concentration‐dependent, and emulsion stability than LM pectic polysaccharide. The solubility of HM pectin was 90.8%, which is preferable for various industrial applications. LM pectic polysaccharide was characterised by a higher % radical‐scavenging activity in a concentration‐dependent manner. XRD analysis revealed LM pectic polysaccharide to possess higher crystallinity (53%) and SEM analysis revealed its surface to be rough and coarse.