Community Research and Development Information Service - CORDIS


In the international trade of electrolytic ("cathode") copper, the contracts require the determination of up to 19 elements which must, alone or in groups of several elements, be below limits of typically 1.0 E-6 to 1.0 E-5 microg/g. Disputes between laboratories being frequent, industry has requested reference materials for quality control purposes. Several BCR reference materials have been prepared and certified. Each certification project followed the same pattern. After production of a material, the homogeneity was verified and samples were distributed to several laboratories applying different methods of analysis, where strict quality control was applied; the results were discussed with all participants and doubtful results were not accepted. The certification is based on a statistical evaluation of the results of the various laboratories and methods. The agreement between various methods and laboratories proves the absence of detectable systematic error in the certified value.

Additional information

Authors: VANDENDRIESSCHE S, CEC, Bruxelles (BE)
Bibliographic Reference: Paper presented: 11th International Symposium on Microchemical Techniques, Wiesbaden (DE), Sept. 1, 1989
Availability: Text not available
Record Number: 198910773 / Last updated on: 1994-12-01
Original language: en
Available languages: en