Characterization of natural low-methoxyl pectin from sunflower head extracted by sodium citrate and purified by ultrafiltration

Food Chemistry
Jiaqi KangHui Yang

Abstract

Sunflower head pectin was extracted by 0.6% (w/v) sodium citrate under 85°C, 3.5h with a solid to liquid ratio of 1:40, giving the maximum uronic acid yield of 16.90% (w/w). The extract was purified by an ultrafiltration membrane with the molecular weight cut-off of 8000 Da and dried by spray-drying to obtain SFHP(A) powders with particle diameters of 2-5 μm. In comparison to the SFHP(B) extracted by ammonium oxalate and isolated by alcohol, SFHP(A) had a close DM (22.56%) but a considerably lower DAm (3.42%). HPSEC-MALLS analysis suggested that SFHP(A) has undergo a deeper degradation resulting in smaller Mw and Mn. HPAEC-PAD showed that SFHP(A) contains more neutral sugars since the degraded RG fragments have been retained during ultrafiltration. Finally, pectin aggregation in aqueous was investigated by FEG-SEM, which reveals that pectin network structure is constructed by microfilaments via coiling, intertwining and crosslinking.

References

May 20, 2008·Current Opinion in Plant Biology·Debra Mohnen
Sep 29, 2011·Carbohydrate Research·Aleksandra R NesicDusan G Antonovic

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Citations

Feb 6, 2016·The Science of the Total Environment·Elena KhozhaenkoMaksim Khotimchenko
Jan 19, 2017·International Journal of Biological Macromolecules·Maksim KhotimchenkoValeri Kovalev
Apr 21, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Hua ZhangShiguo Chen
Jan 11, 2021·International Journal of Biological Macromolecules·Ana Carolina Barbosa RibeiroNágila Maria Pontes Silva Ricardo
Oct 24, 2017·International Journal of Biological Macromolecules·Marília Locatelli Corrêa-FerreiraCarmen Lúcia de Oliveira Petkowicz
Dec 25, 2019·ACS Applied Materials & Interfaces·Peng SunDi Zhang

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