13C CP/MAS NMR spectra of pectins: a peak-fitting analysis in the C-6 region

A. Synytsya, J. Opíková and J. Brus
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A. Synytsya: Department of Carbohydrate Chemistry and Technology, Institute of Chemical Technology, Prague, Czech Republic; 2Institute of Macromolecular Chemistry, Czech Academy of Science, Prague, Czech Republic
J. Opíková: Department of Carbohydrate Chemistry and Technology, Institute of Chemical Technology, Prague, Czech Republic; 2Institute of Macromolecular Chemistry, Czech Academy of Science, Prague, Czech Republic
J. Brus: Department of Carbohydrate Chemistry and Technology, Institute of Chemical Technology, Prague, Czech Republic; 2Institute of Macromolecular Chemistry, Czech Academy of Science, Prague, Czech Republic

Czech Journal of Food Sciences, 2003, vol. 21, issue 1, 1-12

Abstract: 13C CP/MAS NMR spectra of pectin samples were measured and interpreted. The influence of methylesterification and O-acetylation on chemical shifts of pectin carbons was studied using model pectate, pectinates, and their acetylated derivatives. The spectra were analysed also by peak fitting in C-6 region to obtain the values of methylation (DM), amidation (DAm) and acetylation (DAc), degrees. The results were in a good agreement with both convenient methods (photometry, elemental analysis) and the NMR method based on the relative areas of OCH3 (DM) and CH3 (DAc) resonances.

Keywords: 13C CP/MAS NMR; pectins; peak fitting; degrees of methylation (DM); degrees of acetylation (DAc) (search for similar items in EconPapers)
Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:21:y:2003:i:1:id:3471-cjfs

DOI: 10.17221/3471-CJFS

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