Determination of the noble metals in chromites and other geological materials by radiochemical neutron activation analysis |
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| Authors: | A Cocherie M Volfinger G Meyer |
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| Institution: | (1) CRSCM, GIS (CNRS-BRGM), 1A, rue de la Férollerie, 45071 Orleans Cedex 2, France;(2) Laboratoire P. Süe, CEN Saclay, B. P. no 2, 91190 Gif-sur-Yvette, France |
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| Abstract: | A procedure is described for determining the noble metals in geological samples of varied composition (Si enriched or Cr enriched). This rapid separation procedure allows very low detection limits for all PGE (except Rh) and Ag. It uses the coprecipitation of Pd, Pt, Au, Ag and Ru with Se and Te, and the fixation of Os on an ion-exchange resin. Ir is systematically determined by epithermal NAA using multiparameter coincidence spectrometry. |
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