日本地球惑星科学連合2018年大会

講演情報

[JJ] ポスター発表

セッション記号 S (固体地球科学) » S-GC 固体地球化学

[S-GC46] 固体地球化学・惑星化学

2018年5月22日(火) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:下田 玄(産業技術総合研究所地質調査総合センター)、鈴木 勝彦(国立研究開発法人海洋研究開発機構・海底資源研究開発センター)、山下 勝行(岡山大学大学院自然科学研究科、共同)、石川 晃(東京大学大学院総合文化研究科)

[SGC46-P01] Rapid determination of whole-rock major, minor and trace element concentration for silicate, carbonate and phosphate rocks by ICP-SFMS

*石川 晃1秋澤 紀克2沢田 輝1河野 聖那1 (1.東京大学大学院総合文化研究科、2.東京大学大気海洋研究所)

キーワード:主要元素分析、微量元素分析、二重収束型ICP質量分析

A simple analytical method for the determination of whole-rock major, minor and trace element composition by sector magnetic field type inductively coupled plasma-mass spectrometer (ICP-SFMS) using fused-glass bead (sample + lithium tetraborate) has been developed. This method is particularly useful for rapid but quantitative evaluation of sedimentary sections comprised of variable mixture of silicate, carbonate and phosphate minerals. The fused-glass beads were prepared after LOI (loss on ignition) evaluation, and were properly dissolved into a diluted nitric acid with internal standard elements (In and Bi). The analytical procedure using ICP-SFMS at low, middle and high resolution mode was optimized and evaluated through analyses of sedimentary (JDo-1, JLs-1, JCp-1, NIST694, and JCh-1) and granitic reference materials (JG-1a, JG-2 and JG-3). The results demonstrate that the whole-rock major (Si, Ti, Al, Fe, Mn, Mg, Ca, Na, K and P), minor (Sc, V, Cr, Co, Ni, Cu, Zn and Ga) and trace element compositions (Rb, Sr, Y, Zr, Nb, Cs, Ba, REE, Hf, Ta, Pb, Th and U) of wide-variety of sedimentary rocks were reasonably quantified with the analyses of ICP-SFMS using a standard solution prepared from basaltic reference materials such as JB-3.