Capillary furnace for improved peak resolution in gas isotope ch

Details Capillary furnace for improved peak resolution in gas isotope ch Capillary furnace for improved peak resolution in gas isotope ch

1997-01-31

1998-07-21

Williams, Hezron E.

Measuring and testing

Gas analysis

Gas chromatography

73 2342, 55197, 55386, 422 89, 436161, 250288, B01D 1508, B01D 5944, H01J 4904, G01N 3008

Patent

active

057837414

ABSTRACT:
An isotope ratio monitoring gas chromatograph-mass spectrometer (irm-GC/MS) unit for generating a chromatogram having improved resolution for peaks representative of individual carbon dioxide isotopes measured when a complex GC amenable organic sample (e.g. petroleum hydrocarbons) is combusted in the presence of a metal catalyst. The present irm-GC/MS unit is similar to known irm-GC/MS units of this type except it uses a capillary combustion tube in the furnace which is connected to the capillary column and has approximately the same inside diameter as that of the capillary column (e.g. 0.25 mm I.D.) whereby any "dead volume" attributable to the combustion tube is substantially eliminated.

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