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the seventh round of the IRMM-International Measurement Evaluation Programme (IMEP-7) is presented. 277 clinical laboratories in seventeen countries participated using their routine methods. The measurands consisted of nine inorganic components present at minor and trace levels in human serum.
Participants results for seven of the components are graphically reported and compared to reference values established by isotope dilution mass spectrometry and neutron activation analysis. The overall conclusion is that routine measurements of total concentrations of the componenets by clinical laboratories are of high quality. The fraction of gross errors is small (around one percent) and the self declared uncertainty values are generally fairly good. Results are further commented on with respect to the recent development of Metrology in Chemistry.

Additional information

Authors: ORNEMARK U, Swedish Testing and Research Institute, Boras (SE);VAN NEVEL L, IRMM, Geel (BE);TAYLOR P, IRMM, Geel (BE);POULSEN E, IRMM, Geel (BE);DE BIEVRE P, IRMM, Geel (BE)
Bibliographic Reference: Article: Accrediation and Quality Assurance, 1998
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