https://doi.org/10.1351/goldbook.08064
Property of a reference material, demonstrated by the closeness of agreement between the relation among the measurement results for a stated quantity in this material, obtained according to two given measurement procedures, and the relation obtained among the measurement results for other specified materials.
Notes:
- The reference material in question is usually a calibrator and the other specified materials are usually routine samples.
- The measurement procedures referred to in the definition are the one preceding and the one following the reference material (calibrator) in question in a calibration hierarchy (see ISO 17511).
- The material stability of commutable reference materials should be monitored regularly.
- Cases in which a reference material producer is required to conduct assessment of commutability are outlined in ISO 15194.
- Guidance for assessment of commutability of reference material in laboratory medicine is provided by IFCC.