Abstract
The applicability of high-temperature capillary gas chromatography was tested for higher members of normal alkanes up to dohectane. The samples used were synthesized and showed a high state of purity. The linear relationships were proved between the logarithm of the retention time and the number of carbon atoms in the molecule, n, for the chromatography at an isothermal operation. It was possible to detect the difference in n by one for octacontane samples. The homologous impurity was proved to be quantitatively determined by the chromatography under an isothermal operation or under a programmed-temperature operation for mixtures of a limited range of n. The latter mode operation was desirable to detect higher components as sharp peaks. Even for dohectane the high-temperature capillary gas chromatography could be applied for the purpose of purity determination.
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