<sup>13</sup>C CP/MAS NMR spectra of pectins: a peak-fitting analysis in the C-6 region
Synytsya, A. | opíková, J. | Brus, J.
<sup>13</sup>C 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 OCH<sub>3</sub> (DM) and CH<sub>3</sub> (DAc) resonances.
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