Measuring and testing – Gas analysis – Gas chromatography
Reexamination Certificate
2007-05-22
2007-05-22
Williams, Hezron (Department: 2856)
Measuring and testing
Gas analysis
Gas chromatography
Reexamination Certificate
active
11189467
ABSTRACT:
Disclosed are systems and methods that include a sampling device, a chromatographic column, and a transfer line through which a fluid containing analytes to be measured are communicated from the sampling device to the column. The pressure at which the fluid containing the analytes is applied at the inlet of the transfer line is adjusted as the temperature of the column increases in accordance with certain relationships in order to maintain a substantially constant flow rate or velocity for the fluid exiting the column. In this way, the system compensates for changes in the viscosity of the fluid flowing through the column that result from changes in the column temperature.
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Edwards Richard G.
Tipler Andrew
Fitzgerald John
PerkinElmer LAS, Inc.
St. Onge Steward Johnston & Reens LLC
Williams Hezron
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