The preparation of codfish candidate reference material to be certified for Pb, Cd, Hg, Fe and Zn
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, it gives details of 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 are 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.
Bibliographic Reference: Paper presented: 4th International Symposium on Biological and Environmental Reference Materials, Orlando, Florida (US), Feb. 5-8, 1990
Availability: Available from (1) as Paper EN 35238 ORA
Record Number: 199010890 / Last updated on: 1994-12-01
Original language: en
Available languages: en