Application of the DEPT pulse sequence for the generation of 13CHn subspectra of coal-derived oils

The application of the recently developed DEPT pulse sequence for the generation of 13CHn subspectra of coal-derived oils is determined. The technique is able to generate subspectra with accurate cancellation of signals of unwanted multiplicity for complex oil mixtures containing broad and overlappi...

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Bibliographic Details
Published in:Fuel (Guildford) 1984-09, Vol.63 (9), p.1276-1280
Main Authors: Barron, Peter F., Bendall, M.Robin, Armstrong, Lyndon G., Atkins, Ann R.
Format: Article
Language:English
Subjects:
Applied sciences
coal
coal-derived liquids instrumental methods of analysis
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
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Summary:The application of the recently developed DEPT pulse sequence for the generation of 13CHn subspectra of coal-derived oils is determined. The technique is able to generate subspectra with accurate cancellation of signals of unwanted multiplicity for complex oil mixtures containing broad and overlapping resonances. However, the use of signal intensities in DEPT subspectra to determine quantitatively the amounts of CHn groups present in oil mixtures suffers in accuracy due to variable polarization transfer and relaxation rates.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(84)90437-X