Freeze drying for gas chromatography stationary phase...

Details Freeze drying for gas chromatography stationary phase... Freeze drying for gas chromatography stationary phase...

2007-01-02

2007-01-02

Therkorn, Ernest G. (Department: 1723)

Liquid purification or separation

Processes

Chromatography

C210S198200, C095S088000, C096S101000

Reexamination Certificate

active

10998847

ABSTRACT:
The present disclosure relates to methods for deposition of gas chromatography (GC) stationary phases into chromatography columns, for example gas chromatography columns. A chromatographic medium is dissolved or suspended in a solvent to form a composition. The composition may be inserted into a chromatographic column. Alternatively, portions of the chromatographic column may be exposed or filled with the composition. The composition is permitted to solidify, and at least a portion of the solvent is removed by vacuum sublimation.

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patent: 6709743 (2004-03-01), Draveling
patent: 2004/0211730 (2004-10-01), Zhang et al.

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