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Characterization of nonionic surfactants using supercritical fluid chromatography and carbon‐13 nuclear magnetic resonance spectroscopy
Author(s) -
Kalinoski Henry T.,
Jensen Arnold
Publication year - 1989
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/bf02670106
Subject(s) - supercritical fluid chromatography , supercritical fluid , characterization (materials science) , chemistry , carbon fibers , nuclear magnetic resonance spectroscopy , spectroscopy , chromatography , supercritical carbon dioxide , mass spectrometry , analytical chemistry (journal) , gas chromatography , materials science , organic chemistry , nanotechnology , physics , quantum mechanics , composite number , composite material
Capillary supercritical fluid chromatography, using a carbon dioxide mobile phase and flame ionization detection, was employed for characterization of nonionic alcohol ethoxylate surfactants. Data from separations was used to calculate average molecular weights, degree of ethoxylation and distribution of telomers. The SFC approach was compared with carbon‐13 nuclear magnetic resonance spectroscopy for evaluation of the same samples. The faster chromatographic technique permitted information to be obtained in the presence of materials which interfered with the NMR analysis, and provided a means of identifying the minor components of mixtures. The advantages and disadvantages of the methods are discussed and the complementary nature of the techniques illustrated.