DOI: 	10.7795/720.20260121
Title: 	Additional data for the deliverable "D6: Inter-laboratory comparison report, describing sample preparation requirements, sample introduction methods, and uncertainty budgets"
Authors: 	Chambon, Lucille, Commissariat à l'énergie atomique et aux énergies alternatives, Paris, FRANCE, ORCID: 0000-0002-6034-5233
            Amaral Saraiva, Marina, Commissariat à l'énergie atomique et aux énergies alternatives, Paris, FRANCE
            Gupta, Soumya, Commissariat à l'énergie atomique et aux énergies alternatives, Paris, FRANCE
            Isnard, Hélène, Commissariat à l'énergie atomique et aux énergies alternatives
            Jerome, Simon, Norges miljø- og biovitenskapelige universitet, Ås, NORWAY
            Puzas, Andrius, Fizinių ir technologijos mokslų centras, Vilnius, LITHUANIA
            Salminen-Paatero, Susanna, Helsingin Yliopisto, Helsinki, FINLAND
            Christl, Marcus, Eidgenössische Technische Hochschule Zürich, SWITZERLAND
            Corcho Alvarado, José Antonio, Nuclear Chemistry Division, Spiez Laboratory, Federal Office for Civil Protection, Spiez, SWITZERLAND
            Eberhardt, Janine, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 6.1, Radioaktivität, ORCID: 0000-0002-9287-5933
            Flierl, Lukas, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 6.1, Radioaktivität, ORCID: 0000-0003-2710-4072
            Hain, Karin, Universität Wien, Fakultät für Physik, Wien, AUSTRIA
            Nikolić, Jelena Krneta, Institut za nuklearne nauke Vinča Institut od nacionalnog značaja za Republiku Srbiju, Univerzitet u Beogradu, Belgrad, SERBIA
            North, Sonia, Agilent Technologies, Stockport, UK
            Perez-Tribouillier, Habacuc, Eidgenössische Technische Hochschule Zürich, Zürich, SWITZERLAND
            Pichler, Sophie, Agentur für Gesundheit und Ernährungssicherheit GmbH, Vienna, AUSTRIA
            Röllin, Stefan, Nuclear Chemistry Division, Spiez Laboratory, Federal Office for Civil Protection, Spiez, SWITZERLAND
            Štrok, Marko, Institut Jožef Stefan, Ljubljana, SLOVENIA
            Virtanen, Sinikka, Säteilyturvakeskus, Vantaa, FINLAND
            Winkler, Stella, Helmholtz-Zentrum Dresden - Rossendorf e. V., Dresden-Rossendorf, GERMANY 

Contributors: 	HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887
Languages: 	en
Resource Type: 	PTB: Measurement data, DINI: ResearchData, DataCite: Dataset
Publisher: 	Physikalisch-Technische Bundesanstalt (PTB)
Rights: 	CC-BY 4.0, https://creativecommons.org/licenses/by/4.0/

Relationships: 	IsDocumentedBy: DOI 10.7795/810.20251106
Dates: 	Available: 2026-01-21 
Keywords: 	interlaboratory comparison ; reference material ; measurement of radioactive pollutants ; mass spectrometry ; gamma spectrometry ; alpha spectrometry
Abstract: 	This dataset describes the results of two interlaboratory comparisons using two reference materials (RM), a spiked natural seawater and a spiked synthetic sand. The measurands selected were the mass fraction of 238U, 239Pu, 241Am and 237Np, and the 234/238U, 235/238U, 236/238U and 239/240Pu isotope ratios. The liquid comparison involved 11 participants, who produced a total of 83 results. The solid comparison involved 11 participants who produced a total of 79 results. This dataset presents the assigned values for each measurand, the results of the participants and their analysis following statistical criteria.

Remark: 	The information in this dataset is associated with the Deliverable " D6: Inter-laboratory comparison report, describing sample preparation requirements, sample introduction methods, and uncertainty budgets", showing the same data but in a more user friendly format than the pdf-format of the Deliverables, following the FAIR data principles. The Deliverable report should be consulted to receive more information about the determination of the data within the dataset:
The Deliverable report is published in the PTB-OAR: https://doi.org/10.7795/810.20251106.

Table of Contents: 	
    Description of the individual files:
        Table 6. Results obtained for the mass fraction of 234U and performance statistics – liquid RM.
        Table 7. Results obtained for the mass fraction of 235U and performance statistics – liquid RM.
        Table 8. Results obtained for the mass fraction of 236U and performance statistics – liquid RM.
        Table 9. Results obtained for the mass fraction of 237Np and performance statistics – liquid RM.
        Table 10. Results obtained for the mass fraction of 238U and performance statistics – liquid RM.
        Table 11. Results obtained for the mass fraction of 239Pu and performance statistics – liquid RM.
        Table 12. Results obtained for the mass fraction of 240Pu and performance statistics – liquid RM.
        Table 13. Results obtained for the mass fraction of 241Am and performance statistics – liquid RM.
        Table 14. Results obtained for the 239Pu + 240Pu mass activity and performance statistics – liquid RM.
        Table 15. Results obtained for the total U content and performance statistics – liquid RM.
        Table 16. Results obtained for the 234U/238U isotope ratio and performance statistics – liquid RM.
        Table 17. Results obtained for the 235U/238U isotope ratio and performance statistics – liquid RM.
        Table 18. Results obtained for the 236U/238U isotope ratio and performance statistics – liquid RM.
        Table 19. Results obtained for the 240Pu/239Pu isotope ratio and performance statistics – liquid RM.

        Table 25. Results obtained for the mass fraction of 234U and performance statistics – solid RM.
        Table 26. Results obtained for the mass fraction of 235U and performance statistics – solid RM.
        Table 27. Results obtained for the mass fraction of 236U and performance statistics – solid RM.
        Table 28. Results obtained for the mass fraction of 237Np and performance statistics – solid RM.
        Table 29. Results obtained for the mass fraction of 238U and performance statistics – solid RM.
        Table 30. Results obtained for the mass fraction of 239Pu and performance statistics – solid RM.
        Table 31. Results obtained for the mass fraction of 240Pu and performance statistics – solid RM.
        Table 32. Results obtained for the mass fraction of 241Am and performance statistics – solid RM.
        Table 33. Results obtained for the 239Pu + 240Pu mass activity and performance statistics – solid RM.
        Table 34. Results obtained for the total U content and performance statistics – solid RM.
        Table 35. Results obtained for the 234U/238U isotope ratio and performance statistics – solid RM.
        Table 36. Results obtained for the 235U/238U isotope ratio and performance statistics – solid RM.
        Table 37. Results obtained for the 236U/238U isotope ratio and performance statistics – solid RM.
        Table 38. Results obtained for the 240Pu/239Pu isotope ratio and performance statistics – solid RM.

    Common Information:
        * Research object = Single and mixed radionuclide standard solutions.
        * Method = Decay counting and mass spectrometric techniques.
        * Format = XLSX, TSV (tab separated)
        * Recommended software = Excel, LibreOffice, OnlyOffice
        * Variables =
        + Mass fraction in mg/g
        +Activity in Bq/g
        + Total U content in mg/g
        + Isotope Ratios in mol/mol
        + 1st criterion,
        + 2nd criterion,
        + Score
        (Hint: The two criteria and the score are described in Appendix 6 of the D6 report) 

Funding: 	European Commission (EC), ISNI: 0000 0001 2162 673X, Grant Title: Metrology for the harmonisation of measurements of environmental pollutants in Europe, Grant Number: EPM 21GRD09 MetroPOEM 
Funding acknowledgement: 	The project 21GRD09 MetroPOEM has received funding from the European Partnership on Metrology, co-financed from the European Union’s Horizon Europe Research and Innovation Programme and by the Participating States.
