Separation of n-octadecane-1-C14 from asphaltic* mixtures by elution chromatography

Details Separation of n-octadecane-1-C14 from asphaltic* mixtures by elution chromatography Separation of n-octadecane-1-C14 from asphaltic* mixtures by elution chromatography

Dec 1960

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1960gecoa..21..151n&link_type=abstract

Geochimica et Cosmochimica Acta, Volume 21, Issue 1-2, p. 151-155.

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id="ab1"It is often assumed that the n-heptane chromatographic fraction represents the total saturated hydrocarbon content of asphaltic matter. This assumption, however, is based on an approximation rather than on an analytically rigorous finding. C14-labelled n-octadecane was mixed with the semi-solid Athabasca petroleum and the mixture was eluted with a series of solvents. The majority, but not all, of the radioactive material was recovered with n-heptane from aluminium oxide and silica gel columns. For example, combined counts equivalent to 2·32 per cent of the n-heptane eluate counts were recorded in consecutive eluate fractions, (such as in the pyridine fractions) from a Fisher alumina column. It is recommended in routine geological studies that the chromatographic fractions be analysed by suitable means to ascertain their composition and to identify their impurities.

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