COMMISSION ON ISOTOPE SPECIFIC MEASUREMENTS AS TRACEABLE
REFERENCES (II.4)
Number: 240/11/97
Title: Trace Elements in Natural Water
Series: International Measurement Evaluation Programme (IMEP-9)
Coordinator(s): J.
Moody and P. Taylor
Remarks: World wide participation.
Completion Date: 2000 - Project Completed
Objective:
Although there has been an earlier IMEP for natural water, this
one will have samples with water at lower and therefore more challenging
concentrations. The project was initiated at the request of participants
in earlier IMEP water programmes and reflects an increased interest
in the quality of water measurement data. The project will have more
certification laboratories and possibly more certified elements than
the 14 elements in IMEP-6. There
are no other schemes for water measurement that cover all continents
around the globe.
Progress:
Project Completed
Samples used in IMEP-9 were also offered to the BIPM Consultative
Committee on Amount Substance for a comparison. In this comparison,
nine national measurement institutes participated. Fifteen elements
were certified or assigned in the natural water using multiple certification
institutes in for some elements. This participants' programme, one
of the largest to date (200 participants), was completed in 1998 and
a participants technical report was prepared by IRMM (I. Papadakis,
et al., March 1999, EUR 18724 EN). Two other publications for the
open literature have been prepared:
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 (IMEP-9) using ID-ICP-MS, J. Vogl, C. R. Qu�tel, M. Ostermann,
I. Papadakis, L. Van Nevel, P. D. P. Taylor, Accred Qual Assur
5 (2000) 7, 272-279
Establishment
of SI-traceable reference ranges for the content of various elements
in the IMEP-9 water sample, I. Papadakis and P. D. P. Taylor,
Accred Qual Assur 5 (2000) 8, 331-338
The participants reaction has been to encourage another similar IMEP
round for drinking water.
Last Update: 26 April 2001