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Issue 2, 2001
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International Measurement Evaluation Programme: IMEP-9, trace elements in water

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The International Measurement Evaluation Programme (IMEP) is an interlaboratory comparison scheme, founded, owned and coordinated by the Institute for Reference Materials and Measurements (IRMM) since 1988. IMEP-9 is the third round of trace elements in water evaluation following IMEP-3 and IMEP-6. Reference values for 15 elements stating total concentrations and combined uncertainties (according to GUM) were established. The reference values were established mainly by isotope dilution mass spectrometry (IDMS) as a primary method of measurement, and values traceable to the SI were obtained. The four elements that could not be certified by IDMS were assigned values by means of other measurement techniques. Results from 201 laboratories from 35 countries and four continents were evaluated against the reference values and the comparability between the laboratories is presented graphically.

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Publication details

The article was received on 25 Oct 2000, accepted on 24 Nov 2000 and first published on 24 Jan 2001

Article type: Paper
DOI: 10.1039/B008619N
Citation: Analyst, 2001,126, 228-233
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    International Measurement Evaluation Programme: IMEP-9, trace elements in water

    I. Papadakis, J. V. Nørgaard, E. Vendelbo, L. V. Nevel and P. D. P. Taylor, Analyst, 2001, 126, 228
    DOI: 10.1039/B008619N

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