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  • Contribution to the certification of B, Cd, Mg, Pb, Rb, Sr and U in a natural water sample for the International measurement Evaluation Programme Round 9 using isotope dilution ICP-MS


The present paper describes the contribution of the IRMM to the certification of the B, Cd, Mg, Pb, Rb, Sr and U amount content in a natural water sample, which is used in round 9 of the International Measurement Evaluation Programme. The analytical procedure to establish the reference values for the B, Cd, Mg, Pb, Rb, Sr and U amount contents is based on Isotope dilution inductively coupled mass- spectrometry used as a primary method of measurement. Applying this procedure reference values, traceable to the SI, have been obtained for the natural water sample of IMEP-9. For each of the certified amount contents presented here a total uncertainty budget was calculated by using the method of propagation of uncertainties according to ISO and EURACHEM guidelines.

Additional information

Authors: IRMM, ;JRC-GEEL (BE),
Bibliographic Reference: Article: Journal of Accreditation and Quality and Assurance, (1999
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