Traceability of values carried by reference materials
Traceability is a property of the result of a measurement. Since values carried by materials must also have been obtained by measurement -of necessity-, the definition of traceability applies. But traceability of the origin of a reference material should be named differently ie by 'trackability'. An analysis of the function of values carried by reference materials, shows that they can fulfill different functions, depending on their use. Functions located outside the traceability chain are: validating a method or evaluating an approximate size of the uncertainty of the measurement of the unknown sample by performing a measurement on the reference material used as a simulated sample. Other functions are located inside the traceability chain, as in the case where it is used as an added internal standard. Then, the reference material is essential for establishing the traceability of the measured value of the unknown sample. In such application, it is proposed to call the reference material an amount standard.
Bibliographic Reference: Paper presented; CERM 99, Praha (CZ), 6-9th September (1999)
Availability: Available free of charge from Public Relations and Publications Unit, Ispra (IT)
Record Number: 199911438 / Last updated on: 1999-10-01
Original language: en
Available languages: en