Gas chromatograph

Details Gas chromatograph Gas chromatograph

1996-06-20

1997-06-10

Williams, Hezron E.

Measuring and testing

Gas analysis

Gas chromatography

73 2342, G01N 3002

Patent

active

056377878

ABSTRACT:
A gas chromatograph has a switch valve for selectably directing an incoming carrier gas into a first flow route for split analyses or into a second flow route for direct injection analyses. A pressure sensor and a bypass flow route with low flow resistance connected to the carrier gas supply route are also connected to the switch valve. When the switch valve is set for a split analysis, the pressure sensor becomes connected to a vaporization chamber through a flow route with low flow resistance. When the switch valve is set for a direct injection analysis, the pressure sensor becomes connected to the carrier gas supply route through the bypass flow route.

REFERENCES:
patent: 3112639 (1963-12-01), Maxwell
patent: 3119251 (1964-01-01), Bowers
patent: 3150517 (1964-09-01), Kuffer et al.
patent: 3447360 (1969-06-01), Laseter
patent: 4587834 (1986-05-01), Fisher
patent: 4732581 (1988-03-01), Cheh et al.
patent: 5049509 (1991-09-01), Szakasits et al.
patent: 5468643 (1995-11-01), Su et al.

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