Summary
The basic fraction of crude coal tar was isolated in a two-step partition process. Its constituents, mostly azaarenes up to four-ring structures, were resolved on a Superox-coated glass capillary column and tentatively identified by combined gas chromatography/mass spectrometry.
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Novotny, M., Wiesler, D. & Merli, F. Capillary gas chromatography/mass spectrometry of aza-arenes isolated from crude coal tar. Chromatographia 15, 374–377 (1982). https://doi.org/10.1007/BF02259222
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DOI: https://doi.org/10.1007/BF02259222