Abstract
Triple gamma coincidence counting of192Ir allowed the determination of Ir by instrumental neutron activation analysis down to 1 ppb in ultrabasic rocks and down to ca. 20 ppb in some high-furnace slags; the limiting factor for the latter matrix was the presence of124Sb. Radiochemical neutron activation analysis of the USGS standard rocks revealed that the Ir contents are up to three orders of magnitude lower than previously reported, except for the ultrabasic rocks. The factor of merit of several scintillation and semiconductor, gamma-ray detectors was determined for the neutron activation determination of Pd, Pt and Os. In the case of radiochemically pure sources, a NaI(Tl) wafer was preferred; in the presence of high-energy gamma-emitters, a Ge(Li) low-energy photon detector was superior.
Similar content being viewed by others
References
T. W. Steele, National Institute for Metallurgy, Johannesburg, South Africa: General Information on the South African Platinum Ore Sample, Rept. C 47/71.
R. Gijbels, Talanta, 18 (1971) 587.
R. Gijbels, J. Hoste, Nuclear analytical methods in the production and industrial use of noble metals. Possibilities for the application of neutron activation analysis”, Report ITE-66-E, Bureau Eurisotop, Brussels, Nov. 1971, 108 pp.
R. Gijbels, H. T. Millard, G. A. Desborough, A. J. Bartel, Activation Analysis in Geochemistry and Cosmochemistry, Universitetsforlaget, Oslo 1971, p. 359.
L. P. Greenland, J. J. Rowe, J. I. Dinnin, U. S. Geol. Survey Prof. Paper 750-B (1971) B-175.
W. D. Ehmann, D. M. McKown, Anal. Letters, 2 (1969) 49.
W. D. Ehmann, P. A. Baedecker, D. M. McKown, Geochim. Cosmochim. Acta, 34 (1970) 493.
W. D. Ehmann, Fortschr. Chem. Forsch., 14 (1970) 49.
W. D. Ehmann, D. M. McKown, J. W. Morgan, Activation Analysis in Geochemistry and Cosmochemistry, Universitetsforlaget, Oslo 1971, p. 267.
R. Wölfle, U. Herpers, Mikrochim. Acta, (1970) 933.
J. Turkstra, W. J. De Wet, Talanta, 16 (1969) 1137.
J. Turkstra, P. J. Pretourius, W. J. De Wet, Anal. Chem., 42 (1970) 835.
D. F. Covell, Anal. Chem., 31 (1959) 1785.
D. De Soete, R. Gijbels, J. Hoste, Neutron Activation Analysis, Wiley-Interscience 1972.
F. J. Flanagan, Geochim. Cosmochim. Acta, 31 (1967) 289.
F. J. Flanagan, written communication (1972).
G. H. Morrison, A. T. Kashuba, Anal. Chem., 41 (1969) 1842.
J. T. Wasson, P. A. Baedecker, Proc. Apollo 11 Lunar, Science Conf., Vol. 2, Pergamon 1970, p. 1741.
E. Anders, R. Ganapathy, R. R. Keays, J. C. Laul, J. W. Morgan, Proc. Second Lunar Science Conf., Vol. 2, The M.I.T. Press, 1971, p. 1021.
P. A. Baedecker, R. Schaudy, J. L. Elzie, J. Kimberlin, J. T. Wasson, Proc. Second Lunar Science Conf., Vol. 2, The M. I. T. Press, 1971, p. 1023.
A. O. Brunfelt, E. Steinnes, Talanta, 18 (1971) 1197.
H. A. Das, R. Janssen, J. Zonderhuis, Radiochem. Radioanal. Letters, 8 (1971) 257.
H. T. Millard, A. J. Bartel, Activation Analysis in Geochemistry and Cosmochemistry, Universitetsforlaget, Oslo 1971, p. 353.
J. Kimberlin, C. Charoonratana, J. T. Wasson, Radiochim. Acta 10 (1968) 69.
A. H. Jaffey, Nucleonics, 18 (1960) No. 11, 180.
L. A. Currie, Anal. Chem., 40 (1968) 587.
J. Hertogen, R. Gijbels, Anal. Chim. Acta, 56 (1971) 61.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gijbels, R., Govaerts, A. Practical aspects of neutron activation determination of the platinum metals. J. Radioanal. Chem. 16, 7–19 (1973). https://doi.org/10.1007/BF02517847
Issue Date:
DOI: https://doi.org/10.1007/BF02517847