TUBİTAK Adresli Yayınlar Topluluğu
Published January 1, 2016 | Version v1
Journal article Open

An interlaboratory comparison on whole water samples

Creators

  • 1. BAM, Bundesanstalt Mat Forsch & Prufung, Richard Willstatter Str 11, D-12489 Berlin, Germany
  • 2. JRC IRMM, Inst Reference Mat & Measurements, Retieseweg 111, B-2440 Geel, Belgium
  • 3. LNE, Lab Natl Metrol & Essais, 1 Rue Gaston Boissier, F-75015 Paris, France
  • 4. Phys Tech Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany
  • 5. Natl Metrol Inst, Chem Grp Lab, Tubitak UME, POB 54, TR-41470 Gebze, Turkey
  • 6. Univ Oviedo, Fac Chem, Dept Phys & Analyt Chem, Julian Claveri 8, E-33006 Oviedo, Spain
  • 7. Jozef Stefan Inst, Dept Environm Sci, Jamova 39, Ljubljana 1000, Slovenia
  • 8. Helmholtz Zentrum Geesthacht, Max Planck Str 1, D-21502 Geesthacht, Germany
  • 9. Finnish Environm Inst, Hakuninmaantie 6, Helsinki 00430, Finland
  • 10. Umweltbundesamt, Bismarckpl 1, D-14193 Berlin, Germany
  • 11. Biroul Roman Metrol Legala, Sos Vitan Barzesti 11,Sectorul 4, Bucharest 042122, Romania

Description

The European Water Framework Directive 2000/60/EC requires monitoring of organic priority pollutants in so-called whole water samples, i.e. in aqueous non-filtered samples that contain natural colloidal and suspended particulate matter. Colloids and suspended particles in the liquid phase constitute a challenge for sample homogeneity and stability. Within the joint research project ENV08 "Traceable measurements for monitoring critical pollutants under the European Water Framework Directive 2000/60/EC", whole water test materials were developed by spiking defined amounts of aqueous slurries of ultra-finely milled contaminated soil or sediment and aqueous solutions of humic acid into a natural mineral water matrix. This paper presents the results of an European-wide interlaboratory comparison (ILC) using this type of test materials. Target analytes were tributyltin, polybrominated diphenyl ethers and polycyclic aromatic hydrocarbons in the ng/L concentration range. Results of the ILC indicate that the produced materials are sufficiently homogeneous and stable to serve as samples for, e.g. proficiency testing or method validation. To our knowledge, this is the first time that ready-to-use water materials with a defined amount of suspended particulate and colloidal matter have been applied as test samples in an interlaboratory exercise. These samples meet the requirements of the European Water Framework Directive. Previous proficiency testing schemes mainly employed filtered water samples fortified with a spike of the target analyte in a water-miscible organic solvent.

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