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Analytical 13 C NMR spectroscopy of fatty quaternary amines
Author(s) -
Fairchild E. H.
Publication year - 1982
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02662232
Subject(s) - ammonium , chemistry , nuclear magnetic resonance spectroscopy , spectroscopy , ammonium chloride , solvent , fatty acid , nuclear overhauser effect , reproducibility , analytical chemistry (journal) , organic chemistry , chromatography , physics , quantum mechanics
Natural abundance 13 C nuclear magnetic resonance spectroscopy (CMR) has been used for the rapid, nondestructive analysis of fatty quaternary ammonium compounds. Quantitative analysis of mixtures of mono‐, di‐and tri‐fatty ammonium chlorides can be accommpublished under conditions that do not involve heat or extremes of pH and that are independent of solvent present. In order to determine optimal conditions for quantitative studies, carbon spin lattice relaxation times (T 1 ) and nuclear Overhauser effects (NOE) were determined for each of the components. The method of internal standard addition was used to determine reproducibility and accuracy of the method for the measurement of mono‐and tri‐fatty quaternary components in material consisting predominantly (i.e., greater than 90%) of di‐fatty‐dimethyl ammonium chloride.