Analysis for the rare-earth elements by neutron activation and Ge(Li) spectrometry
- 29 Downloads
A procedure for analysis of 12 of the rare-earths, tested on more than a hundred samples of rocks and minerals, is described. Carrier is added for each element to be determined. Samples are fused with Na2O2. The rare-earths are separated as a group, then precipitated and mounted as oxalates for Ge(Li) spectrometry. Following radioassay, chemical yields for the individual rare-earths are obtained by irradiation and counting of the carrier. About two months are needed to obtain complete data for a set of four samples, but many samples are analyzed concurrently. The precision and accuracy exceed ±5 per cent for 10 of the elements in 0.1 to 0.5 g samples of common rocks.
KeywordsStatistical Uncertainty Chemical Yield Isopropyl Ether Standard Monitor Peak Channel
Unable to display preview. Download preview PDF.
- 1.L. A. Haskin, T. R. Wildeman, M. A. Haskin,J. Radional. Chem., 1 (1968) 337.Google Scholar
- 6.L. Erdey, Gravimetric Analysis, Part III, Pergamon, New York, 1965, p. 189.Google Scholar
- 7.G. H. Morrison, H. Freiser, Solvent Extraction in Analytical Chemistry, John Wiley, New York, 1957, p. 231.Google Scholar
- 9.F. A. Frey, M. A. Haskin, J. A. Poetz, L. A. Haskin,J. Geophys. Res., 73 (1968) 6085.Google Scholar
- 10.E. B. Denechaud, Rare-Earth Activation Analysis: Improvement and Application to Stretishorn Dike and Duluth Complex, Ph. D. Thesis, University of Wisconsin, Madison, 1969.Google Scholar