Analytical engine for gas chromatograph

Details Analytical engine for gas chromatograph Analytical engine for gas chromatograph

1996-09-09

1999-11-16

Williams, Hezron

Measuring and testing

Gas analysis

Gas chromatography

73 2335, 422 89, 422 93, G01N 3030, G01N 3002, H05B 102

Patent

active

059837039

ABSTRACT:
An assembly of chromatograph components which operate at a uniform elevated or reduced temperature and perform the functions of sample injection, precolumn backflush, analytical column selection, detection in a reduced mass and volume, and with a reduced surface area for reduced power consumption in accordance with use in a portable gas chromatograph is disclosed. Parts of the assembly including a switching valve assembly, a column plate, a thermal cover and a detector block are thermally-linked and those parts of the assembly which contact the sample including the gas chromatograph columns are maintained at a controlled temperature using, for example, an efficient axial heater, a Peltier cooler or a heat pipe and temperature sensors, thereby increasing analytical confidence.

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The Valco Model VIII, Model VIII Diaphragm Valves, Injection, Switching, and Stream Selection Valves, pp. 217-219.

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