Quality control

Quality control


Samples are numbered and controled at each analysis step.


All instruments and all analytical methods are validated.

Non Contamination

All analytical steps are regularly controlled.
Grinder is choosen in order to limit contamination Digestion blanks are systematically analysed with unknown samples in order to control mineralization and instrumental analysis steps.


Standards(BCR or NIST type) follow the entire analytical procedure. Control charts are implemented.


An uncertainty value is given for each analysis result

Exemple of a control chart:

carte controle

Unknown samples and control samples are analysed in the same batch. If the control sample value is above red limits, sources of error are identified and all samples preparation and analysis are done again.

Modification date : 13 September 2023 | Publication date : 02 November 2010 | Redactor : F.de Raemaeker