Abstract
A Molsieve 5A wide-bore capillary column was systematically studied for the separation of CO and N 2 in the presence of other permanent gases, including noble gases, light hydrocarbons and nitriles, which are all plausible constituents of Titan's atmosphere. This column has a chromatographic behaviour similar to that of a molecular sieve 5A packed column. The efficiency of the column, the detection limit of CO in N 2 and the effect of the presence of nitriles in the injected samples on the chromatographic performance of the column were characterized by determining Van Deemter curves for CO, N 2 and noble gases at different temperatures. This column offers a rapid separation of the selected solutes under isothermal conditions, with about 1000 theoretical plates/m at 60°C for most of the solutes.
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