Negative temperature profiling using microwave GC apparatus

Details Negative temperature profiling using microwave GC apparatus Negative temperature profiling using microwave GC apparatus

2007-11-06

2007-11-06

Hopkins, Robert (Department: 1724)

Gas separation: processes

Chromatography

With heating or cooling

C096S101000, C073S023390

Reexamination Certificate

active

10798233

ABSTRACT:
A method is disclosed for performing GC separations using a separation protocol including at least one negative temperature ramp, where the negative temperature ramp is controlled either by the introduction of a gaseous coolant at a controlled and adjustable rate or by the introduction of the coolant along with the application of microwave radiation to a column capable of absorbing microwave radiation, where the rate of coolant introduction or the rate of coolant introduction and radiation introduction is sufficient to achieve a desired rate of cooling.

REFERENCES:
patent: 5808178 (1998-09-01), Rounbehler et al.
patent: 5939614 (1999-08-01), Walters et al.

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