A simple closing technique for capillary column making

Liquid butane as a solvent for static coating of capillary columns

“…When carefully heated, the teflon tubing becomes transparent and extended, it can be stretched while cooling and thereby tighten smoothly around the column end. One end of the column was sealed with a glass plug [17] oragoodclamp [18].Theotherendwasconnected to a syringe needle (tight fit) which was inserted through the septum into the vial containing the coating solution. To avoid bubble formation in the solution during filling it was necessary to pressurize the vial to about 3 bar.…”

End Closures for Fused Silica and Glass Capillary GC Columns

“…Sometimes the closures are made by simple mechanical methods such as use of a stopper [10,11], clamp [12,13], or squeeze [14]; others are obtained by melting the end of the glass capillary, drawn to an extremely fine tip in a flame [15].…”