Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1993-12-14
1995-06-13
Berman, Jack I.
Radiant energy
Ionic separation or analysis
With sample supply means
250282, H01J 4904
Patent
active
054245397
ABSTRACT:
Background of the invention is the isotope ratio analysis of carbon and nitrogen as components of hydrocarbon compounds. The separation into individual components takes place in a gas chromatograph and oxydation in a downstream combustion oven, into, inter alia CO.sub.2 and N.sub.2. In general CO.sub.2 is present in a much larger quantity than N.sub.2. The measurement values on the mass spectrometer have accordingly different dimensions. In order to approximate the peak values, a dilution with additional helium as a carrier gas takes place in the analysis of CO.sub.2. This has the additional advantage that the helium as a carrier gas, which is present anyway, as a result is present in approximately equal quantities relative to the CO.sub.2 and N.sub.2 in the ion source of the mass spectrometer. The dilution takes place in the region of a so-called open split (18).
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Brand Willi
Habfast Karleugen
Berman Jack I.
Beyer James
Finnegan Mat GmbH
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