Abstract
A precise, sensitive and rapid analytical technique has been developed for the simultaneous determination of Zr and Hf in natural silicate matrices. The technique is based on radiochemical neutron activation analysis and employs a rapid fusion dissolution of the sample and simultaneous precipitation of the Zr−Hf pair with p-hydroxybenzene arsonic acid in an acidic medium. The indicator radionuclides,95Zr and181Hf, are counted with a pair of high resolution Ge(Li) detectors and the95Zr activity is corrected for the contribution from U fission. The chemical yields of the radiochemical separation are based on Hf carrier, which quantitatively carries both Zr and Hf. The yield is determined by reactivation of the processed samples and standards with a252Cf isotopic neutron source and by counting the 18.6 sec half-life179mHf. The sensitivity, precision and accuracy of the procedure are demonstrated by replicate analyses of several standard rocks, meteorites and lunar samples which exhibit a wide range of Zr and Hf abundances.
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J. R. BUTLER, A. J. THOMPSON, Geochim. Cosmochim. Acta, 29 (1965) 167.
W. D. EHMANN, T. V. REBAGAY, Handbook of Elemental Abundances in Meteorites, B. MASON (Ed.), Gordon and Breach Sci. Publ., New York, 1971. pp. 307–318.
J. L. SETSER, W. D. EHMANN, Geochim. Cosmochim. Acta, 28 (1964) 769.
J. ESSON, P. HAHN-WEINHEIMER, J. JOHANNING, Talanta, 15 (1968) 1111.
T. V. REBAGAY, W. D. EHMANN, J. Radioanal. Chem., 5 (1970) 51.
R. GANAPATHY, G. M. PAPIA, L. GROSSMAN, Earth Planet, Sci. Letters, 29 (1976) 302.
E. P. MIGNONSIN, I. ROELANDTS, Radiochem. Radioanal. Letters, 25 (1976) 41.
G. E. GORDON, K. RANDLE, G. G. GOLES, J. B. CORLISS, M. H. BEESON, S. S. OXLEY, Geochim. Cosmochim. Acta, 32 (1968) 369.
W. A. BROOKSBANK, Jr., in The Radiochemistry of Iron J. M. NIELSEN (Ed.), National Academy of Science—National Research Council, NAS-NS 3017, 1960, p. 32.
R. H. FULMER, D. P. STRICOS, T. F. RUANE, Nucl. Sci. Eng. News, 46 (1971) 314.
K. FLYNN, Argonne National Laboratory, private communication.
P. A. BAEDECKER, Anal. Chem., 43 (1971) 406.
M. JANGHORBANI, C-L. SYA, W. D. EHMANN, Proc. Amer. Nucl. Soc. Topical Meeting, Applications of Californium-252, Sept. 11–13, 1972, CONF-720902, 1975, pp. 231–239.
F. J. FLANAGAN, Geochim. Cosmochim. Acta, 37 (1973) 1189.
A. N. GARG, W. D. EHMANN, Proc. 7th Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 7, Vol. 2, 1976, p. 3397.
L. L. CHYI, W. D. EHMANN, Proc. 4th Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 4, Vol. 2, 1973, pp. 1219–1226.
A. V. KOSTERIN, V. N. ZUEV, I. D. SHEVALEEVSKII, Geochemistry, (1958) 116.
K. RANDLE, Chem. Geol., 13 (1974) 237.
C. K. BROOKS, Geochim. Cosmochim. Acta, 33 (1969) 357.
C. K. BROOKS, Geochim. Cosmochim. Acta, 34 (1970) 411.
W. D. EHMANN, A. N. GARG, unpublished data.
R. B. HAHN, L. WEBER, Anal. Chem., 28 (1956) 414.
H. WÄNKE, H. BADDENHAUSEN, G. DREIBUS, E. JAGOUTZ, H. KRUSE, H. PALME, B. SPETTEL, F. TESCHKE, Proc. 4th Lunar Sci. Conf., Geochim. Cosmochim. Acta, Suppl. 4, Vol. 2, 1973, pp. 1461–1481.
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Kumar, P.A., Garg, A.N. & Ehmann, W.D. Precise simultaneous determination of zirconium and hafnium in silicate rocks, meteorites and lunar samples. J. Radioanal. Chem. 40, 51–64 (1977). https://doi.org/10.1007/BF02517313
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DOI: https://doi.org/10.1007/BF02517313