2015, Volume 18, Issue 1
Analysis of Trace Amounts of Carbon Dioxide, Oxygen and Methane in Nitrogen: A Comparison of Two Different Analytical Techniques
1 National Research and Development Institute for Cryogenics and Isotopic Technologies - ICSI Rm. Valcea, Uzinei Street no. 4, PO Box Râureni 7, 240050, Râmnicu Vâlcea, Romania
2 Politehnica University of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7 Polizu Str., 011061, Bucharest, Romania
Pure gases, ranging from 99.996% (4.6 grades) to 99.99999% (7.0 grades) purity, are used in various applications, from technological applications (i.e. for special welding operations) to the analytical ones as carrier gas in gas chromatography, or as calibration standard. In this work, two different analytical techniques applied to detect trace impurities in pure gases were compared, highlighting their strengths and weaknesses. For this purpose a sample of pure gas with known concentration was measured by gas chromatography and mass spectrometry in order to determine the impurities and perform a critical interpretation.
carbon dioxide, oxygen, methane, analytical techniques
Tag search carbon dioxide oxygen methane analytical techniques