Microminiature gas chromatograph

Details Microminiature gas chromatograph Microminiature gas chromatograph

1995-07-07

1996-12-10

Brock, Michael

Measuring and testing

Gas analysis

Gas chromatography

G01N 3020

Patent

active

055832814

ABSTRACT:
A microminiature gas chromatograph (.mu.GC) comprising a least one silicon wafer, a gas injector, a column, and a detector. The gas injector has a normally closed valve for introducing a mobile phase including a sample gas in a carrier gas. The valve is fully disposed in the silicon wafer(s). The column is a microcapillary in silicon crystal with a stationary phase and is mechanically connected to receive the mobile phase from the gas injector for the molecular separation of compounds in the sample gas. The detector is mechanically connected to the column for the analysis of the separated compounds of sample gas with electronic means, e.g., ion cell, field emitter and PIN diode.

REFERENCES:
patent: 4471647 (1984-09-01), Jerman et al.
patent: 4895500 (1990-01-01), Hok et al.
patent: 4935040 (1990-06-01), Goedert
patent: 5277556 (1994-01-01), Van Lintel
patent: 5313061 (1994-05-01), Drew
patent: 5487313 (1996-01-01), Johnson

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