Open AccessCharacteristic of carrageenan Eucheuma cottonii collected from the coast of Tanjung Medang Village and Jaga Island, Riau
Author(s) -
Andarini Diharmi,
Rusnawati,
N. Irasari
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/404/1/012049
Subject(s) - carrageenan , chemical composition , extraction (chemistry) , chemistry , polysaccharide , food science , chromatography , organic chemistry
Carrageenan is a group of polysaccharides extracted from red seaweed. Carrageenan extraction can be done by several methods, one of which is alkaline solution (KOH) because KOH produces a stronger gel than other alkalis. Carrageenan was extracted using hot alkali followed by precipitation, drying, and milling. The purpose of this study was to determine the chemical composition of dried E. cottonii from North Tanjung Medang Village and Jaga island coastal sea regions and physico-chemical characteristics of carrageenan extracted with KOH solutions 4, 8 and 12%. The results of analysis showed that the chemical composition of dried E.cottonii of both costal sea regions not significant. The chemical characteristics of carrageenan from Tanjung Medang Village and Jaga Island using KOH 4, 8, and 12%, were moisture (11-8%), ash (27-36%), acid-insoluble ash (1.66-2.0%), and sulphate content (24-29%), those not significant all carrageenan except ash content. Whereas the physical characteristics of both carrageenan were significantly different. The results of this study indicated that the carrageenan extracted with KOH (4.8, and 12%) has similar physico-chemical characteristics except for gel strength, viscosity, and ash content.