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Effect of Vacuum on the Performance of the Flame Ionization Detector Used for Vacuum-outlet Gas Chromatography by Ulrich R. Bernier; Christopher L. Bray; Richard A. Yost is a Engineering article available to read on EtoBox.

What is Effect of Vacuum on the Performance of the Flame Ionization Detector Used for Vacuum-outlet Gas Chromatography about?

Vacuum-outlet operation of short fused-silica open tubular columns for gas chromatography provides benefits to analysis speed by increasing the optimum velocity while minimizing the loss in resolution. Vacuum-outlet operation of a column with a gas chromatographic detector necessitates that the detector also be under vacuum. Simple modifications were made to a gas chromatograph᎐flame Ž . ionization detector GC᎐FID for vacuum-inlet and vacuum-outlet operation. The vacuum-inlet system was operated in the splitless mode to allow for efficient sample loading prior to operation at reduced pressures. The goal of FID operation at 100 torr or less was achieved by using oxygen in place of air and optimizing the gas flows under vacuum to maintain a stable flame at pressures as low as 46 torr. An outlet pressure of 85 torr with optimized gas flows allowed for routine operation of the FID without solvent flame-out. It was discovered that the sensitivity is enhanced compared to atmospheric operation over a range of outlet pressures from approximately 200 to 400 torr; however, operation of the FID at the lowest possible pressures decreases the analytical sensitivity due to both the outlet pressu

Who reads Effect of Vacuum on the Performance of the Flame Ionization Detector Used for Vacuum-outlet Gas Chromatography?

Author

Ulrich R. Bernier; Christopher L. Bray; Richard A. Yost

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1040-7685)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)