Abstract: A chromatographic oven assembly is described. The assembly includes an oven which is machined or formed from a low thermal mass material such as a silica/ceramic composite to form a cylindrical oven cavity. The capillary column is supported in a helical configuration in the oven cavity spaced from the walls with the ends extending through the insulating material for introduction of sample mixture and detection of the separated components of the mixture. An electric heater and a fan are mounted in a separate module and introduce heated air through a tangential opening, and receive air after it has circulated in the oven through a tangential opening. Air is continuously heated and circulated to maintain the column at the elevated temperature. For cooling, the heater is bypassed and cool ambient air is introduced tangentially into the oven by the fan and expelled to the atmosphere. In another embodiment, the fan and heater are mounted in the oven cavity.

Abstract: An electrolytic conductivity detector cell featuring a flow bore for communicating gaseous products of a gas chromatographic system designed to provide electrolytic conductivity supporting compounds, combined with a liquid solvent in which the compounds in question dissolve. Electrodes are provided, in general, in the form of conducting pins which are positioned in bores in the cell block, intersecting the flow bore to expose surfaces of the electrodes to the fluids in the bore.