Russell M Clinton

US Patent:

41336402, Jan 9, 1979

Filed:

Feb 16, 1978

Appl. No.:

5/878500

Inventors:

Russell M. Clinton - Houston TX
A. Allilee Taylor - Mont Belvieu TX
Jimmy W. Brown - Dayton TX

Assignee:

Gulf Oil Corporation - Pittsburgh PA

International Classification:

G01N 2502
G01N 3108

US Classification:

23230PC

Abstract:

Apparatus is provided for the chromatographic analysis of a plurality of samples having volatile components present in a nonvolatile matrix. The apparatus includes as its principal elements: (a) an oven, (b) A sample cylinder mounted in the oven, which cylinder includes an entry port external of the oven for admitting and withdrawing sample boats from the cylinder, (c) A chromatographic analysis column mounted in the oven, (d) A detector element for analyzing the outlet gas of the analysis column, (e) Two chromatographic trap columns external of the oven, (f) A first gas line for feeding a first carrier gas through the sample cylinder and one of the trap columns, (g) A second gas line mounted in the oven for feeding a second inert carrier gas through one of the trap columns and the analysis column, and (h) A valve assembly having two fixed operating positions which feed the two carrier gases in reversed flow through different trap columns when changed from one operating position to the other.