Radiant energy – Ionic separation or analysis – With sample supply means
Patent
1998-03-11
2000-02-29
Westin, Edward P.
Radiant energy
Ionic separation or analysis
With sample supply means
250281, 436173, 436161, 422 70, H01J 4904
Patent
active
060312289
ABSTRACT:
An apparatus and method for measuring the isotope ratio of samples containing carbon and nitrogen compounds. The method includes steps of (a) adding a sample containing carbon or nitrogen compounds to a sample introduction component in which a mixture of analytes is separated into specific molecules, and wherein said sample introduction comprises means for continuous sample introduction into a chemical reaction interface (CRI); wherein said CRI converts intact carbon and nitrogen analytes into new element-specific compounds in an environment comprising fluorine to resolve said compounds; and (b) calculating the isotope ratio of the compounds of said sample with mass spectrometer capable of making precise isotopic measurements. The reactant gas in the reaction chamber is a fluorine gas which allows for better resolution and calculation of the isotope ratio of carbon and nitrogen compounds, with hydrogen, sulfur and oxygen-containing compounds.
REFERENCES:
patent: 4933548 (1990-06-01), Boyer et al.
H. Song and F. Abramson, "Nitrogen Trifluoride: A New Reactant Gas in CRIMS for Detection of Phosphorus, Deuterium, Chlorine, and Sulfur", American Society for Mass Spectrometry, 1995, No. 6, pp. 421-427.
Wells Nikita
Westin Edward P.
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