Journal
CARBOHYDRATE RESEARCH
Volume 358, Issue -, Pages 82-88Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2012.06.018
Keywords
Determination of uronates; HPLC; NMR; Polysaccharides
Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Ministry of Health, Labour, and Welfare of Japan
- Japanese Health Sciences Foundation
- Grants-in-Aid for Scientific Research [24590046] Funding Source: KAKEN
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A sensitive high-performance liquid chromatographic (HPLC) method for the determination of uronates isolated from polysaccharides found in natural products such as glycosaminoglycans and alginate is described. Preparation of iduronate, guluronate, and mannuronate as analytical standards for high performance liquid chromatography was achieved by depolymerization of dermatan sulfate and alginate in 2.5 mol L-1 trifluoroacetic acid at 100 degrees C for 6 h. Structures of resulting products (iduronate, guluronate, and mannuronate) were characterized by 600 MHz H-1 NMR. Five uronates (glucuronate, iduronate, mannuronate, guluronate, and galacturonate) were separated on a Dionex CarboPac PA1 column using an isocratic elution with 8 mmol L-1 acetate buffer (pH 4.84) and were monitored by fluorescence detection using 1.5% 2-cyanoacetamide as a post-column fluorogenic reagent. As little as 50 pmol of each uronate could be detected with excitation at 331 nm and emission at 383 nm. (C) 2012 Elsevier Ltd. All rights reserved.
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