PILOT STUDY: A preparative comparison using the 'harmonization' method on standards of synthetic natural gas (CCQM-P87)

Twenty-two standards of synthetic natural gas standards were submitted from ten different NMIs for a comparison using the harmonization method developed by NPL. All standards had seven components. This method can remove the correlated variation in calibration data for multi-component mixtures and makes a significant improvement in fitting individual points to calibration curves. After removing the non-random variation from the data all the standards showed very good agreement with only a few outliers. The typical deviation from the calibration curves was around 0.05% (relative) for the main components and less than 0.2% for the butanes.

Main text. To reach the main text of this paper, click on Final Report.

The final report has been peer-reviewed and approved for publication by the CCQM GAWG.