Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1991-06-05
1992-08-25
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55197, 55208, 55267, 55386, B01D 1508
Patent
active
051415321
ABSTRACT:
A gas chromatography system which incorporates a simplified sample injection system in which replaces conventional mechanical injection systems with one based strictly upon thermal trapping of a continuously supplied carrier gas and sample stream. The carrier gas and sample stream pass continuously through the device which incorporates a thermal focusing chamber which communicates with the inlet end of a gas chromatography separation column. By causing the focusing chamber temperature of a sample tube passing through the focusing chamber to be dropped, incoming components comprising the sample stream are condensed and trapped. Injection into the column occurs rapidly heating the sample in the thermal focusing chamber causing a narrow sample plug to be introduced into the column. Various embodiments of this invention are intended for operation for evaluating carrier gas and sample stream provided at a above atmospheric pressure, or which are drawn through the system by vacuum source at the outlet end of the column. In addition, vacuum backflushing features are also described.
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Rankin Christine L.
Sacks Richard D.
Spitzer Robert
The Regents of the University of Michigan
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