Measuring and testing – Gas analysis – Gas chromatography
Reexamination Certificate
2007-11-15
2010-11-02
Larkin, Daniel S (Department: 2856)
Measuring and testing
Gas analysis
Gas chromatography
C073S023360, C073S023410, C095S082000, C095S086000, C096S101000, C096S103000, C096S104000
Reexamination Certificate
active
07823439
ABSTRACT:
The present invention is directed to a method for multidimensional gas chromatography for separating the analytes of a complex sample. The method comprises the steps of introducing the sample onto a first column whereby the sample is separated into at least two segments, introducing at least one segment into a heartcut device whereby the segments are selectively separated into at least two heartcut fractions, introducing at least one of the fractions onto a second column whereby at least one fraction is further separated into at least two analytes, introducing at least one analyte from the second column to a gas chromatography connector, introducing the analyte from the connector to a third column, and introducing the analyte from the third column into a detector whereby the analyte is analyzed and identified.
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Hsieh, Molecular Diversity, vol. 2 Issue 4, Jun. 1995, pp. 186-196 “Multidimensional Chromatography Coupled with Mass Spectrometry for Target-Based Screening”.
Husch & Blackwell LLP
Larkin Daniel S
Midwest Research Institute
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