IP 392: Determination of aromatic hydrogen and carbon content - High resolution nuclear magnetic resonance spectroscopy method
- Method adopted/last revised:
- Method reapproved: 2020
- REF/ISBN:
- Status: Current
- First printed in STM books:
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This method covers the determination of
aromatic hydrogen and aromatic carbon contents of
hydrocarbon oils. These include kerosines, gas oils,
mineral lube oils, coal liquids and other distillates
which are completely soluble in chloroform and/or
carbon tetrachloride. The detection limit is typically
0.1% aromatic hydrogen and 0.5% carbon for
Fourier transform (FT) spectrometers but for
continuous wave (CW) instruments which can be
used to measure aromatic hydrogen contents, the
limit is considerably higher and typically 0.5%.
The method does not cover the determination
of the concentrations of aromatic compounds in oils
and is not applicable to samples containing more
than typically 1% olefinic or phenolic compounds.
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