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Metrology for Stable Isotope Reference Standards

Work Packages

​WP1 - New reference materials for δ13C-CO2 and δ18O-CO2 to uphold the global measurement infrastructure

  • Develop gas reference materials of pure CO2 for δ13C-CO2 and δ18O-CO2

  • Develop static and dynamic stable isotope reference gas mixtures of CO2 at 400 µmol/mol

  • Validation of reference materials and comparisons to uphold VPDB scale for CO2 - air mixtures

  • Exploratory absolute measurements

WP2 - New international reference materials and scale for δ15Nα, δ15Nβ and δ18O-N2O

  • Develop techniques to link δ15N, δ18O and 15N site preference in N2O to the international stable isotope ratio scales

  • Develop reference materials for δ15N, δ18O and 15N site preference in N2O

  • Static and dynamic mixtures at 300 – 1000 nmol/mol for instrument calibration

WP3 - Advancing optical isotope ratio spectroscopy for CO2 and N2O

  • Spectroscopic methods for isotope ratio measurements of CO2

  • Spectroscopic methods for isotope ratio measurements of N2

  • Comparison of methods

WP4 - Creating Impact

  • Establish methods for the preparation of static and dynamic gas reference materials, and new developments in spectroscopy

  • To ensure that the developments achieved within the project will be available for exploitation by a wide range of stakeholders in industry, the metrology and scientific community and societal institutes and bodies