Abstract
The investigation of the effect of temperature in liquid chromatography on pyrocarbon-containing adsorbents is considered in terms of heats of transfer, solvent eluotropic strength, column linear capacities, pressre drops and efficiencies. The selectivity of the system is scarcely altered on changing the temperature; it decreases by less than 10% when the temperature increases from ambient to 65°C. The heat of transfer, which is determined by the nature of the mobile phase, increases directly with increasing capacity factor of the solute. The eluotropic strength of the solvent is hardly affected by the temperature. The linear capacity of the column increases two-fold with a 40°C increase in temperature. The greater effect of temperature on the column efficiency and pressure drop is due to the decrease in the solvent viscosity, resulting in larger diffusion coefficients of the solutes.
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