IP 392: Determination of aromatic hydrogen and carbon content - High resolution nuclear magnetic resonance spectroscopy method

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  • Method adopted/last revised:
  • Method reapproved: 2020
  • Status: Current
  • First printed in STM books:

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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