Purity Analysis in Gas Metrology
Published Online: 3 FEB 2010
Copyright © 2009 ISTE Ltd.
Transverse Disciplines in Metrology
How to Cite
French College of Metrology (2009) Purity Analysis in Gas Metrology, in Transverse Disciplines in Metrology, ISTE, London, UK. doi: 10.1002/9780470611371.ch3
- Published Online: 3 FEB 2010
- Published Print: 1 JAN 2009
Print ISBN: 9781848210486
Online ISBN: 9780470611371
The Reference Gas Laboratory (LGR) of the Portuguese Institute for Quality (IPQ) is the Primary Laboratory in Portugal in the field of gas metrology. Its main mission is to assure and guarantee the accuracy and traceability  of the gas measurements to national and international standards. LGR is also a consumer of pure gases to be used as raw material in the gravimetric preparation of primary gas mixtures. The laboratory needs to measure and control the purity level of the gases supplied by the industry in order to determine the gas composition with higher accuracy. Several methods are used for purity analysis, namely, Gas Chromatography (GC), Fourier Transform Infrared Spectrometry (FTIR) and Mass Spectrometry (MS). These analytical methods will be briefly described and documented with some examples of gas purity analysis made at LGR: Propane (C3H8), Nitrogen Monoxide (NO) and automotive mixtures (CO+CO2+C3H8 in Nitrogen).