Authors: X. Li 1 and M. Ebihara 2
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  • 1 Chinese Academy of Sciences Shanghai Institute of Nuclear Research Shanghai 201800 P.R. China
  • | 2 Tokyo Metropolitan University Department of Chemistry, Graduate School of Science Tokyo 192-0397 Japan
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Abstract  

A modified NiS fire-assay neutron activation method is developed for the determination of all platinum-group elements (PGEs) in mantle-derived xenoliths. This method is characterized by sub-ppb detection limits, <0.1~0.002 ppb procedural blanks and 7~15% analytical precision for PGEs. Analyses of PGE standard rocks indicate that this modified NiS fire-assay neutron activation method is as reliable as the method previously proposed for a large scale of samples. The capability of the method for the measurement of PGEs in the upper mantle is also illustrated by some exciting results obtained from mantle-derived xenoliths of Eastern China.