Appeal No. 95-5074
Application No. 08/186,900
This is an appeal from the final rejection of claims 2-9.
Claim 1, the other claim remaining in the present application,
has been allowed by the examiner. Claims 2 and 5 are
illustrative:
2. A gas chromatographic method, comprising:
loading a mixture onto a first column packed with a
stationary phase wherein mixture components of interest have
different affinities for the stationary phase, the column is
maintained at an elution temperature profile wherein the
temperature increases along the column length from the inlet
to the outlet;
flowing the mixture through the first column to effect at
least a partial separation of the mixture components;
flowing the effluent from the first column through a
second column packed with a stationary phase wherein mixture
components of interest have different affinities for the
stationary phase, the column is maintained at a temperature
profile wherein the temperature decreases along the column
length from the inlet to the outlet; and
recovering the separated components of the mixture from
the outlet of the second column.
5. A gas chromatographic method, comprising:
loading a mixture onto a column packed with a stationary
phase wherein mixture components of interest have different
affinities for the stationary phase, the column is then
provided with a variable elution temperature profile
decreasing along the column length from the inlet to the
outlet of the column;
flowing the mixture through the column to effect at least
a partial separation of the mixture components; and
-2-
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Last modified: November 3, 2007