Determination of 14 trace elements in cobalt by proton-activation analysis.
Proton-activation analysis has been applied to the determination of 14 trace impurities in cobalt. The method consists of a short ($ 10 min) and a longer (2hr) irradiation of the sample with 13-MeV and 12-MeV protons, respectively, followed by high-resolution gamma-ray spectrometry. The elements Ti, Cr. Fe, Ni, Cu, Zn, Nb, Mo, Ru and W have been determined in VP-purity cobalt. In the case of V, Cu. Zr, Pd and Sn, the amounts present were below the limit of detection. In the case of Fe, Ni, and Mo, the results are compared with those obtained by a second independent method. Data on reproducibility, limits of detection and possible interferences are given.
Krivan
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Max-Planck-Institut für Metallforschung, Stuttgart, Institut für Werkstoffwissenschaften, Laboratorium für Reinststoffe, 7070 Schwäbisch Gmünd, Katharinenstrasse 17, Federal Republic of Germany.