Abstract
After the authors' previous study of non-circular capillaries for gas chromatography (GC) showed that only a small increase in efficiency could be effected by these columns, further column forms have been assessed with a view to reducing the resistance to mass transfer in the gas phase. Using the gas path efficiency as the diagnostic different column forms have been assessed, such as static mixer columns, helically coiled open-tube (HOT) columns which Tijssen has considered for liquid chromatography and spinning band columns taken from distillation technology. Results so far obtained show that HOT columns could have potential in GC whilst static mixer and spinning band columns offer no advantage.
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