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Recycle gas chromatography with glass capillary columns
N. V. Sterkhov, Vitalii P Chizhkov
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Abstract
The problem of sharp separations in gas chromatography is encountered in the analysis of isotopes and studying the composition of isotopic systems. a variant of the chromatographic separation of isotopettagged compounds, where the true length of the column and the analysis time are shortened is hydrodynamic-pulse recycle gas chromatography. To solve a number of problems involving a need for sharp separations, the authors feel it is necessary to use capillary columns in recycle systems. Equations were derived and sharp separation time calculated for an ideal chromatographic column (based on adsorption kinetics) and a real-time analysis of isotope-tagged compounds carried out by capillary gas chromatography. Analysis times for real columns were shown to be far different from ideal. The concepts of hydrodynamic-pulse recycle chromatography with capillary columns were confirmed experimentally.