Determination of rare earth elements in hot spring and crater lake waters by epithermal neutron activation analysis |
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| Authors: | T Honda T Oi T Ossaka T Nozaki H Kakihana |
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| Institution: | (1) Atomic Energy Research Laboratory, Musashi Institute of Technology, 971 Ozenji, Asaoku, 215 Kawasakishi, Kanagawa, Japan;(2) Department of Chemistry, Sophia University, 7-1 Kioicho, Chiyodaku, 102 Tokyo, Japan |
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| Abstract: | Determination of the rare earth elements (REE's) in acidic hot spring and crater lake waters by neutron activation analysis (NAA), in which activation was performed mostly by epithermal neutrons (epithermal NAA) was investigated. Nine REE's, La, Ce, Sm, Eu, Tb, Ho, Tm, Yb and Lu, out of fourteen naturally existing REE's were determined at ppb levels with satisfactory precision. The epithermal NAA was found to be more effective in the determination of Sm, Tb, Ho and Yb than normal NAA, in which activation was performed mainly by thermal neutrons. Combined use of the epithermal and normal NAA's enabled the determination of eleven REE's, La, Ce, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb and Lu. |
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