POLYIMIDE FOR DEACTIVATING GAS-CHROMATOGRAPHY VAPORISING CHAMBERS ANDFIXING PACKING MATERIALS

Glass liners serving as vaporising chambers for large volume injection or transfer into capillary gas chromatgraphy were packed with Carbofr it, a carbon material of open structure and low retentive power. Polyi mide was used for deactivation of the glass surface with a water-resis tant layer, for fixing the Carbofrit material to the insert wall and f or binding loose particles.