caa a22 4500 465749038 CHVBK 20180323111828.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322528 doi (NATIONALLICENCE)springer-10.1007/BF00322528 The preparation of codfish candidate reference material to be certified for Pb, Cd, Hg, Fe, and Zn [Elektronische Daten] [J. Pauwels, G. Kramer, L. De Angelis, K. Grobecker] Summary: Since 1985 the conditioning of fresh seafish muscle reference materials to be certified for trace metals has been studied by CBNM at the request of BCR. This paper describes the study of the production process of a codfish reference material to be certified for Pb, Cd, Hg, Fe and Zn and its subsequent preparation. In particular, the collection of the base material, its transformation into powder by cryo-grinding in all-teflon equipment, the production of dry powder by freeze-drying and the conditioning and bottling of the candidate reference material. Production control and final homogeneity assessment were carried out by solid sampling Zeeman atomic absorption spectrometry. Analyses at different stages in the production process indicate that heterogeneities existing in the starting material are gradually eliminated in the subsequent production stages and that no external contamination occurs. Springer-Verlag, 1990 Pauwels J. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut Kramer G. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut De Angelis L. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut Grobecker K. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 515-519 0937-0633 338:4<515 1990 338 216 https://doi.org/10.1007/BF00322528 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322528 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pauwels J. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut NATIONALLICENCE 700 1- Kramer G. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut NATIONALLICENCE 700 1- De Angelis L. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut NATIONALLICENCE 700 1- Grobecker K. Commission of the European Communities, Joint Research Centre, Central Bureau for Nuclear Measurements, B-2440, Geel, Belgium aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/4(1990-01-01), 515-519 0937-0633 338:4<515 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer