Gas separation: processes – Chromatography
Reexamination Certificate
2006-03-10
2010-11-02
Marcheschi, Michael A (Department: 1797)
Gas separation: processes
Chromatography
C095S086000, C096S101000, C096S103000, C096S104000, C096S106000, C073S023350, C073S023420
Reexamination Certificate
active
07824471
ABSTRACT:
The present invention provides a chromatographic method for eliminating interference from interfering agents, coming from the gas sample itself or from the system material used to perform the impurities measurements, on impurities to be quantified in a gas sample. The method advantageously relies on the use of an additional valve and an additional sample loop particularly arranged in a G. C. system, and also on an additional supporting gas inlet operatively connected to the system through the additional sample loop for providing the system with a supporting gas comprising at least a predetermined portion of a predetermined active gas that will react with the unwanted interfering impurities, if any, or with the column material to cancel out unwanted active sites. Thus, the method of the present invention can advantageously be used in gas chromatographic systems to improve sensitivity thereof by acting on column separation material.
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Fortier André
Gamache Yves
Clemente Robert A
Daly, Crowley & Mofford & Durkee, LLP
Marcheschi Michael A
Panalytique Inc.
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