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Published January 1, 2025 | Version v1
Journal article Open

Progress achieved in EURAMET project 21GRD09 MetroPOEM: Metrology for the harmonisation of measurements of environmental pollutants in Europe

Creators

  • 1. Phys Tech Bundesanstalt PTB, Bundesallee 100, D-38116 Braunschweig, Germany
  • 2. Aarhus Univ, Inst Geosci, Hoegh Guldbergs Gade 2, DK-8000 Aarhus C, Denmark
  • 3. TUBITAK UME Natl Metrol Inst Turkiye, TUBITAK Gebze Yerleskesi,Dr Zeki Acar Caddesi 1, TR-41470 Gebze, Kocaeli, Turkiye
  • 4. Univ Paris Saclay, CEA, List, Lab Natl Henri Becquerel LNE LNHB, F-91120 Palaiseau, France
  • 5. Swiss Fed Inst Technol, Dept Phys, Otto Stern Weg 5,HPK H33, CH-8093 Zurich, Switzerland
  • 6. Fed Off Civil Protect, Nucl Chem Div, Spiez Lab, Austr, CH-3700 Spiez, Switzerland
  • 7. Fiziniu Technol Mokslu Cent, Savanoriu Pr 231, LT-02300 Vilnius, Lithuania
  • 8. Univ Wien, Fak Phys, Wahringer Str 17, A-1090 Vienna, Austria
  • 9. Gothenburg Univ, Sahlgrenska Acad, Med Stralningsvetenskap, Inst Klin Vetenskaper, Gula Straket 2 B SU Sahlgrenska, S-41345 Gothenburg, Sweden
  • 10. Triskem Int, ZAC LEperon, 3 Rue champs Geons, F-35170 Bruz, France
  • 11. Inst Natl Cercetare Dezvoltare Pentru Fiz & Ingn N, 30 Reactorului, Magurele 077125, Ilfov, Romania
  • 12. Univ Leoben, Franz Josef Str 18, A-8700 Leoben, Austria
  • 13. Norges Miljo Biovitenskapelige Univ, Elizabeth Stephansen vei 29, N-1433 As, Norway
  • 14. Lab Natl Metrol & Essais, 1 Rue Gaston Boissier, F-75724 Paris, France
  • 15. Natl Measurement Lab, Queens Rd, Teddington TW11 0LY, Middx, England
  • 16. Cesky Metrol Inst, Radiova 1136-3, Prague 10200, Czech Republic
  • 17. Inst Nacl Znacaja Republ Srbiju, Inst Nukl Nauke Vinca, Mike Petrov Alasa 12-14, Vinca 11351, Beograd, Serbia

Description

The European Green Deal's ambition for zero pollution requires development of highly sensitive techniques to detect ultra-low amounts of pollutants and isotope ratios, where mass spectrometry is a key method. The MetroPOEM project bridges the traceability gap between activity and mass-based measurements. Low level radioactive standard solutions (Sr-90, Np-237, U-234, U-236, natural uranium (U-nat), Pu-239, Pu-240, Am-241, Pu-239,Pu-240) were distributed to 18 partner laboratories for measurement by mass spectrometric and decay counting techniques. The results and data analysis will be published separately. SI-traceable high precision methods were developed for isotope ratio determination of Li, B, Cr, Cd, Ni, Sb, Pb and U in seawater. Method development addressed analyte separation from the matrix, evaluation of calibration approaches, isotope fractionation corrections and uncertainty estimation. Seawater (250 L) was taken from the German North Sea exclusive economic zone (DE-EEZ) to develop two certified reference materials (CRMs). Part of this material was used to generate a CRM with SI traceability for isotope ratios of Li, B, Cr, Cd, Ni, Sb, Pb and U. The second part was used to generate a seawater CRM, spiked with U-nat, Np-237, Pu-239,Pu-240 and Am-241. A solid silica-based CRM, spiked with U-nat, Np-237, Pu-239,Pu-240 and Am-241, was produced by sol-gel synthesis, with similar to 10 kg of inactive material for method development. These materials were characterised in accordance with ISO 17034 by interlaboratory studies between project partners, using techniques developed in the project. Two Good Practice Guides, on (i) measurement of radioactivity by mass spectrometry, and (ii) sample treatment, uncertainties, and mass bias quantification, are in draft.

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