蛍光X線分析装置・レーザー溶出型誘導結合プラズマ質量分析計を用いた低希釈率ガラスビードの主成分・微量・希土類元素の迅速定量分析

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This report provides analytical techniques for major, trace and rare earth elements by X-ray fluorescence spectrometry (XRF) and laser ablation-inductively coupled plasma-mass spectrometry (LAICP-MS) at Department of Environmental Changes, Faculty of Social and Cultural Studies, Kyushu University. Totally 42 elements can be measured from low dilution glass bead (sample:flux ratio of 1:2). 23 elements (SiO_2, TiO_2, Al_2O_3, total Fe_2O_3, MnO, MgO, CaO, Na_2O, K_2O, P_2O_5, V, Cr, Co, Ni, Cu, Zn, Ga, Rb, Sr, Y, Zr, Nb and Ba) of each sample were measured in 80 minutes by XRF. The other 19 elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, Pb, Th and U) were later measured in 5 minutes by LA-ICP-MS. Synthetic samples prepared from pure chemical reagents as well as standard samples provided by Geological Society of Japan (GSJ) (20 samples) were used to define individual calibration lines for XRF analysis, and SRM612 glass standard issued by the National Institute of Standard and Technology (NIST) was used as the calibration standard for LA-ICP-MS analysis. Analytical results of the GSJ standard samples appear an agreement with their recommended values mostly within 15% differences. The system can provide abundances of the most elements in rocks, and requires only 1.8g of sample powder, hence it should be very useful not only for geological but also for archeological samples.
2012-03-20