Purity Analysis in Gas Metrology

  1. French College of Metrology
  1. F. Dias and
  2. G. Baptista

Published Online: 3 FEB 2010

DOI: 10.1002/9780470611371.ch3

Transverse Disciplines in Metrology

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

Author Information

  1. Laboratório de Gases de Referěncia, Instituto Portuguěs da Qualidade R. António Gião, 2, 2829–513 Caparica, Portugal

Publication History

  1. Published Online: 3 FEB 2010
  2. Published Print: 1 JAN 2009

ISBN Information

Print ISBN: 9781848210486

Online ISBN: 9780470611371



  • chromatography;
  • ionization;
  • resolution;
  • spectrometry;
  • automotive


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 [1] 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).