JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 62 No 3 (2017): Journal of the Chilean Chemical Society
Original Research Papers

ESTIMATION OF THE UNCERTAINTY IN THE QUANTIFICATION OF H2, N2, CO, CO2 AND CH4 IN GAS SAMPLES

Gisela Bruhn
Laboratorio de Análisis Químico e Instrumental, LabQI Departamento de Química, Universidad Técnica Federico Santa María
María Elena Ortiz
Laboratorio de Análisis Químico e Instrumental, LabQI Departamento de Química, Universidad Técnica Federico Santa María
Catherine Tessini
Laboratorio de Análisis Químico e Instrumental, LabQI Departamento de Química, Universidad Técnica Federico Santa María
Published September 2, 2017

Abstract

The quantification of H2, N2, CO, CO2 and CH4 in gas samples is a routine analysis performed in our laboratory, according to international
standards. All samples contain the five analytes, each one in different concentrations. Estimating uncertainty is important in order to determine the
sources of higher dispersion, in accordance to the requirements of NCh-ISO.17025.

References

  1. Standard Practice for Analysis of Reformed Gas by Gas Chromatography, ASTM D1946-90, (2011).
  2. Trace CO and CO2 in hydrogen and light gaseous hydrocarbons by GC, UOP Method 603-88.
  3. Quantifying Uncertainty in Analytical Measurement, EURACHEM/ CITAC, 3rd Edition (2012).
  4. C. Tessini, C. Mardones, L. Rivas, D. von Baer, Accred. Qual. Assur, 14, (2009).

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