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Study of the Primary Standard of Isotopic Abundance

This project focused on researching measurement methods for absolute values of isotope ratios; developing primary standards or CRMs of elemental isotope abundance with measured atom masses. Furthermore, it will establish and continuously improve a traceability system on isotope abundance measurement, which will enhance the nation’s role in the new round of international metrology system establishment. Research findings and establishment of the project will form a strong back-up to development of energy, security, bio-science fields.

The project has established national primary standards for isotopes; established measurement methods for absolute values of Se and Yb isotopes; developed PRMs and series of CRMs for Zn, Se, Sm and Cd isotopes.