Liquid purification or separation – Processes – Chromatography
Reexamination Certificate
2005-03-08
2008-09-02
Therkorn, Ernest G (Department: 1797)
Liquid purification or separation
Processes
Chromatography
C210S198200
Reexamination Certificate
active
07419598
ABSTRACT:
A bubbler is positioned within a solvent reservoir of a chromatographic system with its opening near the bottom of the system to measure the pressure of solvent. The bubbler may use air or may use helium or some other gas so that the solvent can be purged of excess air while its level is being monitored by the bubbler. The bubbler provides a depth signal to a microcontroller that records the drop in pressure and projects a low level of pressure at which point solvent should be replenished. The microprocessor may provide a signal to the operator or terminate operation or automatically replenish solvent depending upon the program.
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Snyder, Introduction to Modem Liquid Chromatography, 1979, pp. 88-90.
Carney Vincent L.
Teledyne Isco, Inc.
Therkorn Ernest G
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