Symmetrical (double-speed) static coating for high-resolution gas chromatography column preparation.
"Breakthrough" during static coating could be avoided using a new coating strategy: while filling the capillary support with coating solution, a short mercury plug was placed at the middle of the support length. Mercury was frozen by a cold source and vacuum was applied to both open ends. In this way static coating became symmetric and so evaporation rate was doubled, on a time base, and more than doubled on a coated length base. Coating time at room temperature varied from approximately 20 min for 3-m columns to approximately 3 h for 15-m columns.
Nardi
Luigi
L
ENEA-National Agency for New Technologies, Energy and Environment, C.R. Casaccia, via Anguillarese 301, 00060 S.M. Galeria, Rome, Italy. luigi.nardi@casaccia.enea.it
D002849:Chromatography, Gas / Q000295:instrumentation*; D008628:Mercury / Q000737:chemistry
D008628:Mercury