There are different possibilities to use the data obtained on a measurement of a CRM. It can be used to help to:
- validate a method of measurement. This is to see, if the observed value and the certified value match within the uncertainty.
- verify a specific measurement procedure. This is to see, if the observed value and the certified value match within the uncertainty under the specific laboratory conditions.
- control the accuracy of measurements within the uncertainty.
- calibrate a measurement device for a specific type of measurement. This is to establish the relation between a ‘signal’ and the quantity intended to be measured (usually a concentration). In the simple case, a calibration factor and its uncertainty is calculated from the observed value and the certified value.
- establish proficiency testing. The use of a well characterised (i.e. certified) material in form of a ‘blind sample’ is advantageous, in order to monitoring against a stated reference, in particular the inalterable SI being stable in time and space.
- develop new methods of measurement.
- estimate measurement uncertainty.
Keywords: reference material, measurement, quality, standard