Abstract
Several chromatographic columns made from glass tubes of I.D. 0.5–1 mm and with solid support particle sizes of 100–120 and 120–140 mesh were evaluated. The effect of liquid film thickness, column diameter, permeability and particle diameter to column diameter ratio on column efficiency is discussed. The pressure drop at the optimum gas velocity per unit column length and per theoretical plate is considered. A column is discussed with 6250 theoretical plates per metre, and others, les efficient per unit length, with a total of about 60 000 theoretical plates which can be run at about 7 kg/cm 2 if nitrogen is used.
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