New GC Method Translator Speeds Development of Fast GC Methods

The Envantage (USA) Method Translator is a new tool to speed up GC methods using the equation of Golay (the inventor of capillary GC). The EMT is tailored for split/splitless injection on an open end capillary column. Pneumatics are assessed with Hagen-Poiseuille pipe flow and the Halasz gas compressibility correction. Isothermal optimum conditions on smaller columns are obtained with the Enskog and Chapman carrier gas diffusion and a constant liquid diffusion. Pressure drop, typical for fast GC, is accounted for by average column pressure diffusion, which follows from the James and Martin relation. The isothermal resolution gain, speed gain and sensitivity loss apply to temperature programmed gas chromatography as well.