X-ray fluorescence analysis of rare earth elements in rocks using low dilution glass beads

Kenichi Nakayama, Toshihiro Nakamura

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43 Citations (Scopus)


Major and trace elements (Na, Mg, Al, Si, P, K, Ca, Ti, Mn, Fe, Rb, Sr, Y, Zr, La, Ce, Pr, Nd, Sm, Gd, Dy, Th and U) in igneous rocks were assayed with fused lithium borate glass beads using X-ray fluorescence spectrometry. Low dilution glass beads, which had a 1:1 sample-to-flux ratio, were prepared for determination of rare earth elements. Complete vitrification of 1:1 mixture required heating twice at 1200°C with agitation. Extra pure reagents containing determinants were used for calibrating standards instead of the rock standard. The calibration curves of the 23 elements showed good linearity. Furthermore, the lower limits of detection corresponding to three times the standard deviation for blank measurements were 26 mass ppm for Na 2 O, 6.7 for MgO, 4.5 for Al 2 O 3 , 4.5 for SiO 2 , 18 for P 2 O 5 , 1.1 for K 2 O, 4.0 for CaO, 3.9 for TiO 2 , 1.6 for MnO, 0.8 for Fe 2 O 3 , 0.5 for Rb, 0.2 for Sr, 0.4 for Y, 0.5 for Zr, 3.3 for La, 6.5 for Ce, 2.7 for Pr, 2.1 for Nd, 1.7 for Sm, 0.7 for Gd, 2.7 for Dy, 0.5 for Th, and 0.6 for U. Using the present method, we determined the contents of these 23 elements in four rhyolitic and granitic rocks from Japan. 2005

Original languageEnglish
Pages (from-to)815-822
Number of pages8
Journalanalytical sciences
Issue number7
Publication statusPublished - 2005 Jul

ASJC Scopus subject areas

  • Analytical Chemistry

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