抄録
Inductively coupled plasma mass spectrometry (ICP-MS) is applied to geological standard rocks for the determination of Y, lanthanoids (Ln′s), Th and U. Internal standardization is employed for the precise measurement: Rh for Y, In and Tl for Ln′s, Bi for Th and U. For Ln′s, linear interpolation correction is used. Our ICP-MS data agree with the recommended values within 10% for most samples. Their chondrite-normalized Ln abundance patterns are smooth, suggesting that our ICP-MS data are highly accurate and can be used for discussing detailed abundances of Ln′s. The Y, Th and U data are as precise as the Ln data. The simultaneous and precise determination of Ln′s, Th and U enable us to extend the geochemical discussion in better detail than before.
