Reconfigurable pneumatic control for split/splitless injection

Details Reconfigurable pneumatic control for split/splitless injection Reconfigurable pneumatic control for split/splitless injection

1994-05-31

1995-07-11

Spitzer, Robert

Gas separation: processes

With control responsive to sensed condition

Pressure sensed

95 23, 95 82, 96102, 96103, 96105, B01D 1508

Patent

active

054317126

ABSTRACT:
Chromatographic system includes a split/splitless injection port operatively connected to an inlet line for receiving the regulated carrier gas flow, a separation column for receiving at least a portion of the mixture as a column flow, and a split vent line and a septum purge line for outputting respectively a split flow and a septum purge flow. A forward device driver operatively connected to a respective fluid controller controls fluid flow in the inlet line and a back device driver operatively connected to a respective fluid controller controls fluid pressure in the split line. A setpoint controller provides first and second setpoint control output values to a configuration module, which selectably configures the provision of each of the first and second setpoint control output values to a selected one of the forward and back device drivers according to the selection of a split or splitless injection mode.

REFERENCES:
patent: 4948389 (1990-08-01), Klein et al.
patent: 4994096 (1991-02-01), Klein et al.
patent: 5108466 (1992-04-01), Klein et al.
patent: 5141534 (1992-08-01), Sacks et al.
patent: 5163979 (1992-11-01), Patrick et al.
"Improving Splitless Injection with Electronic Pressure Programming," Philip L. Wylie, Richard J. Phillips, Kenneth J. Klein, Michael Q. Thompson, Bruce W. Hermann, pp. 649-655, Journal of High Resolution Chromatography, vol. 14, Oct. 1991.
"Optimization of GC Detector Parameters Using Electronic Pressure Control," Kenneth J. Klein, Paul A. Larson, Jill A. Brekenridge, pp. 616-619, Journal of High Resolution Chromatography, vol. 15, Sep. 1992.
"Applications of Auxiliary Electronic Pressure Control in Gas Chromatography," S. S. Stafford, K. J. Klein, P. A. Larson, R. L. Firor, V. Giarrocco, J. J. Sullivan, J. A. Brekenridge, Application Note-228-202, Sep. 1992, Hewlett Packard.
"Improving the sensitivity of your GC/MS system with electronic pressure control," Linda Doherty, MS Application Brief MS-92-5, Sep. 1992, Hewlett Packard.
"Gas Savings with Electronic Pressure Control," S. S. Stafford, K. J. Klein, P. A. Larson, Application Note 228-203, Sep. 1992, Hewlett Packard.
"Electronic Pressure Control (EPC) Bibliography," Hewlett-Packard Company, Nov. 1993.
"Applications of Electronic Pressure Control and Pressure Programming in Capillary Gas Chromatography," S. S. Stafford, K. J. Klein, P. A. Larson, R. L. Firor, P. L. Wylie, Application Note 228-141, Oct. 1991, Hewlett Packard.
"Gas Chromatography GC-17A User's Manual," Shimadzu Corporation, Chromatographic Instruments Division, chapters 9-11, 1992.

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