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Updated: Jun 28, 2026

Methods to Identify the NMR Resonances of the 13C-Dimethyl N-terminal Amine on Reductively Methylated Proteins
Published on: December 12, 2013
Evaluation of NMR spectroscopy for the quantitative characterization of urea-formaldehyde resins
R Taylor1, R J Pragnell, J V McLaren
1Coal Research Establishment, Stoke Orchard, Cheltenham, Glos. GL52 4RZ, England.
Abstract:
A comparative evaluation has been made of both proton and (13)C nuclear magnetic resonance techniques in the quantitative characterization of commercial urea-formaldehyde resins. There is good agreement between data derived from (13)C NMR spectra and from (1)H high-field continuous wave, or low-field (Fourier transform) NMR spectra. Low-field continuous wave proton spectra exhibit inferior resolution and provide inaccurate quantitative data. Combination of (13)C and proton NMR with nitrogen analysis gives a quantitative characterization technique for these resins.
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