The IRMM--International Measurement Evaluation Program (IMEP). IMEP-3--trace elements in synthetic and natural water.
The aim of the IRMM--International Measurement Evaluation Program (IMEP) is to test out a possible realization of international measurement comparability for field laboratories through traceability of their measurements to the SI Unit for amount of substance: the mole. In IMEP-3, 10 different trace elements, B, Ca, Cd, Cu, Fe, K, Li, Pb, Rb, and Zn, were determined in a synthetic and a natural water by participating laboratories using their routine methods and graphically compared (in coded form) to certified values, established by IRMM and NIST using an isotope-specific method (Isotope Dilution Mass Spectrometry, Neutron Activation Analysis). The number of participants was 70; 64 laboratories have reported results. The results show a spread of more than 50% asymmetrically around the certified value. The Youden graphs allow evaluation of the overall performance of the laboratories in the IMEP-3 round.
Lamberty
A
A
Institute for Reference Materials and Measurements (IRMM), Geel, Belgium.
Lapitajs
G
G
Van Nevel
L
L
Götz
A
A
Moody
J R
JR
Erdmann
D E
DE
De Bievre
P
P
D007753:Laboratories / Q000592:standards; D013058:Mass Spectrometry; D009501:Neutron Activation Analysis; D011865:Radioisotope Dilution Technique; D012015:Reference Standards; D014131:Trace Elements / Q000032:analysis*; D014867:Water / Q000737:chemistry*; D014881:Water Supply / Q000032:analysis*
D014131:Trace Elements; D014867:Water