Non-planar microfabricated gas chromatography column

Details Non-planar microfabricated gas chromatography column Non-planar microfabricated gas chromatography column

2007-09-25

2007-09-25

Smith, Duane (Department: 1724)

Gas separation: apparatus

Chromatography type apparatus

C095S082000, C095S086000, C095S087000, C073S023390

Reexamination Certificate

active

11067107

ABSTRACT:
A non-planar microfabricated gas chromatography column comprises a planar substrate having a plurality of through holes, a top lid and a bottom lid bonded to opposite surfaces of the planar substrate, and inlet and outlet ports for injection of a sample gas and elution of separated analytes. A plurality of such planar substrates can be aligned and stacked to provide a longer column length having a small footprint. Furthermore, two or more separate channels can enable multi-channel or multi-dimensional gas chromatography. The through holes preferably have a circular cross section and can be coated with a stationary phase material or packed with a porous packing material. Importantly, uniform stationary phase coatings can be obtained and band broadening can be minimized with the circular channels. A heating or cooling element can be disposed on at least one of the lids to enable temperature programming of the column.

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