NIST maintains an active role in these two CCQM working groups, participating in international key comparisons and pilot studies, organizing new studies, and working with other national metrology institutes to improve the efficiency and effectiveness of CCQM studies.
Together with other NMIs participating in the Inorganic and Electrochemical Analysis Working Groups (IAWG and EAWG) the work is intended to provide an open, transparent and comprehensive scheme to give users reliable quantitative information on the comparability of national metrology services and to provide the technical basis for wider agreements negotiated for international trade, commerce and regulatory affairs as set forth under the CIPM Mutual Recognition Arrangement (MRA).
NIST participated in several IAWG and EAWG studies during the past three years including:
Decisions to participate in Key Comparisons and Pilot studies organized by the IAWG and EAWG are based on existing or planned CMCs that are maintained by NIST in these measurement areas. Measurements are performed using the identical methods and instrumentation that are used by NIST to certify Standard Reference Materials for inorganic and electrochemical measurands.
Final reports for Key Comparisons may be found in the Technical Supplement of the journal Metrologia. The reports are free and can be located at http://www.bipm.org/en/metrologia/.