Raman spectroscopy of a coal liquid shows that fluorescence interference is minimized with ultraviolet excitation.

  title={Raman spectroscopy of a coal liquid shows that fluorescence interference is minimized with ultraviolet excitation.},
  author={Sanford A. Asher and C. R. Johnson},
  volume={225 4659},
The first ultraviolet resonance Raman measurements of a coal liquid are reported. The spectra detail the presence of numerous polycyclic aromatic hydrocarbons with ring systems similar to those of naphthalene, fluorene, phenanthrene, pyrene, and triphenylene . The ultraviolet resonance Raman measurements of this highly complex sample show no significant interference from fluorescence. The lack of fluorescence interference and the high selectivity indicate that ultraviolet resonance Raman… 

A new selective technique for characterization of polycyclic aromatic hydrocarbons in complex samples: UV resonance Raman spectrometry of coal liquids.

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