Estimation of oxygen group concentrations in coal extracts by nuclear magnetic resonance spectrometry
作者： C. E. Snape , C. A. Smith , K. D. Bartle , R. S. Matthews
DOI: 10.1021/AC00238A009
关键词:
摘要: NMR methods for estimating the concentrations of hydroxyl and nonhydroxyl oxygen groups in coal extracts are described. Hydroxyl converted to silyloxyl, acetyl, methoxyl or adducted with hexafluoracetone their estimated from specific bands spectra derivatives. Those have been assessed a selection extract fractions by comparing group those obtained enthalpimetry, which is an established titration procedure. Concentrations directly /sup/1/sup/3C NMR.
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