Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1993-06-07
1995-08-15
Housel, James C.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
7386421, 7386491, 422 63, 422 80, G01N 3500
Patent
active
054417007
ABSTRACT:
A headspace autosampling apparatus (92) for generating and delivering gaseous samples to a gas chromatograph or other instrument includes a plurality of vials (98) in a carousel (150). The vials are delivered one at a time from the carousel through a vial delivery mechanism (160) to a heated zone (146) wherein the substances (94, 96) to be analyzed reach equilibrium with the headspace (100, 102) above the samples in the vials, preferably using the full evaporation technique (FET). The vials are generally cylindrical and extend horizontally to facilitate attainment of equilibrium rapidly upon heating. The vials are also preferably rotated about their longitudinal axis prior to sampling so as to achieve a film effect on the interior walls of the vials which further aids in attainment of equilibrium. The apparatus is operative to first pressurize the headspace in the vial with an inert gas, and then to place said headspace in fluid communication with the inlet of a gas chromatograph wherein analytes in the headspace volume are analyzed to determine the composition thereof.
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Freed Rachel Heather
Housel James C.
Jocke Ralph E.
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