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Spectr. Sympos. 1974. M. V. Malmstadt, Anal. Chem. 46. H. Koch and K. Ohls, Mikrochim. IV, 39-47 (1970). K. H. Koch and D. Donges, Z. Anal. Chem, 261, 177-191 (1972). K. Ohls, J. Brauner and P. Friedhoff, Z. Anal. Chem. 26£, 342-346 (1973). Pure & Appl. , Vol. 4 9 , p p . 1495 - 1505. Pergamon P r e s s , 1977. P r i n t e d i n Great Britain. ANALYTICAL CHEMISTRY OF THE NOBLE METALS J o n C Van Loon Department of Geology, University of Toronto, Toronto, Ontario M5S 1A1, Canada Abstract - A review of the analytical chemistry of the noble metals is given.

For this purpose a relatively large sample, eg 30 g of finely ground sam­ ple, can be spread out in a thin layer on a cellophane sheet. Then the sam­ ple for analysis is obtained by scooping a small amount from 1/2 in 2 seg­ ments marked over the surface. A number of replicate samples must be taken to obtain the mean composition. Osmium and Ru are the two elements most often neglected in the analysis of the noble metals in samples. In the 1975 certification study of a South African ore, out of 38 participating laboratories, only 6 and 10 reported results for Os and Ru respectively.

Anal. Chem. 250, 369-376 (1970). C. N. A. Fassel, Anal. Chem. L. W. E. Hoyt, 21 Canad. Spectr. Sympos. 1974. M. V. Malmstadt, Anal. Chem. 46. H. Koch and K. Ohls, Mikrochim. IV, 39-47 (1970). K. H. Koch and D. Donges, Z. Anal. Chem, 261, 177-191 (1972). K. Ohls, J. Brauner and P. Friedhoff, Z. Anal. Chem. 26£, 342-346 (1973). Pure & Appl. , Vol. 4 9 , p p . 1495 - 1505. Pergamon P r e s s , 1977. P r i n t e d i n Great Britain. ANALYTICAL CHEMISTRY OF THE NOBLE METALS J o n C Van Loon Department of Geology, University of Toronto, Toronto, Ontario M5S 1A1, Canada Abstract - A review of the analytical chemistry of the noble metals is given.

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