Abstract
Abstract The effects of column outlet pressures on the HETP vs. carrier gas velocity curves are discussed on the basis of KOS theory. It is shown that when a column is operated at a constant outlet pressure higher than atmospheric the minimum of H-\baru curve shifts towards lower HETP and \baru values, and on the contrary the operation at reduced outlet pressure results in the shift of the minimum towards higher HETP and \baru values. The separation factor and number of theoretical plates obtained by a column operated at the outlet pressure of 4.0 atm are superior by ca. 10% to those obtained by normal gas chromatography.
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