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Analysis of Nitrogen for Small Concentrations of Carbon Monoxide by Mass Spectrometry

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Due to coincidence of major peaks of nitrogen and carbon monoxide at mass 28, analysis of combustion gases for carbon monoxide content becomes difficult at concentrations below 5%. Measurement of the relative concentrations is then dependent upon the mass 12 and 14 peaks. With the General Electric Analytical Mass Spectrometer, the carbon monoxide mass 14 peak is approximately 1/200th and the mass 12 peak approximately 1/100th of the mass 28 peak. The nitrogen mass 14 peak is approximately 1/20th of the mass 28 peak. Thus, a small concentration of carbon monoxide in any nitrogen containing sample is not easily and accurately measurable. Chemical conversion of the carbon monoxide to some other gas could facilitate such analyses.

Document Type: Short Communication


Affiliations: General Engineering Laboratory, General Electric Company, Schenectady, New York

Publication date: June 1, 1960

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