Measuring and testing – Gas analysis – Gas chromatography
Reexamination Certificate
2007-10-22
2009-06-30
Larkin, Daniel S (Department: 2856)
Measuring and testing
Gas analysis
Gas chromatography
C073S023350, C095S082000, C096S101000, C096S105000, C096S106000
Reexamination Certificate
active
07552618
ABSTRACT:
Disclosed are systems and methods that include a thermal desorption unit, a chromatographic column, and an interface device between the unit and the column. The interface device controls the fluid flowing into the column, such as by providing additional carrier gas to maintain a substantially constant gas flow or velocity, by proving a controlled temperature increase, or by venting a portion of the gas received from the thermal desorption unit, thereby removing the dependence on the thermal desorption unit for such control. In some embodiments, the interface is a chromatographic injector. In certain embodiments, a transfer line from the desorption unit is coupled to the same port of the interface device as the chromatographic column. In some of these embodiments, this is accomplished by employing a special adaptor.
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International Search Report, Oct. 15, 2005, 7 pages.
Coppola Giuseppe
DeLorenzo Frank
Grecsek Heidi
Tipler Andrew
Larkin Daniel S
PerkinElmer LAS, Inc.
St. Onge Steward Johnston & Reens LLC
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