Gas chromatography

Details Gas chromatography Gas chromatography

1991-02-25

1991-10-15

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55197, 55386, B01D 1508

Patent

active

050571265

ABSTRACT:
In gas chromatography wherein only the more volatile components of a multi-component sample are of interest, the sample is injected into a hot vaporization chamber containing a packing material. An inert carrier gas sweeps the resulting vaporized gases through a second packed column at a lower temperature than the vaporization chamber. After the more volatile components of interest have passed an intermediate conduit, a backflushing stream is fed sequentially through the second column and the vaporization chamber, exhausting through a vent. Simultaneously with opening of the vent, and beginning of the backflushing, a further stream continues to drive the portion of the first stream containing the more volatile components toward and through a chromatographic analytic column.

REFERENCES:
patent: 3366149 (1968-01-01), Taft et al.
patent: 3719084 (1973-03-01), Walker
patent: 3881892 (1975-05-01), Gehrke et al.
patent: 4003257 (1977-01-01), Fletcher et al.
patent: 4035168 (1977-07-01), Jennings
patent: 4180389 (1979-12-01), Paul
patent: 4699768 (1987-10-01), Weiss

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