期刊
CARBOHYDRATE POLYMERS
卷 76, 期 4, 页码 650-656出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2008.11.033
关键词
Sodium alginate; M/G ratio; Microwave irradiation; SEM; C-13 NMR; CD
资金
- Ministry of Earth Sciences, New Delhi [MoES/9-DS/6/2007-PC-IV]
A rapid one-pot method for hydrolysis of sodium alginate for determining M/G ratio has been developed under mild conditions. using microwave irradiation. Poly-mannuronic acid (PMA) and poly-guluronic acid (PGA) ratio was determined (M/G 0.38), which was similar to that (M/G 0.39) obtained by the conventional method, using sodium alginate of Sigma as reference sample for bench marking. For validation of the method PMA and PGA were characterized by density, porosity, viscosity, optical rotation measurements, C-13 NMR, FT-IR, thermogravimetric analysis (TGA), X-ray diffraction, circular dichroism (CID), molar mass distribution (GPC) and scanning electron microscopy (SEM). (C) 2008 Elsevier Ltd. All rights reserved.
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