Separation and identification of some naturally occurring alkylphenanthrenes.
Different separation methods, especially gas chromatography, were applied to crude retene obtained from pine-wood tar. The relative retention times on three different columns, and the melting points, were used to identify the following compounds besides retene itself: 1-methylphenanthrene, 2-ethylphenanthrene, 1,7-dimethylphenanthrene, 1-methyl-7-ethylphenanthrene, 9,10-dihydroretene and possibly l,3-dimethyl-7-ethylphenanthrene, 1,3-dimethyl-7-isopropylphenanthrene. All the substances formed aerosols at the outlet of the gas Chromatograph. Superfine glass wool was found to be an excellent means of coagulating these aerosols.
Jönsson
R
R
Department of Analytical Chemistry, University of Lund, Lund, Sweden.