Determination of Ti, K, Sm and Gd Values in Geological Survey of Japan Reference Materials by Prompt Gamma Neutron Activation Analysis |
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Authors: | Takashi Sano Toshiaki Hasenaka Hiroyuki Sawahata Takaaki Fukuoka |
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Affiliation: | College of Environment and Disaster Research, Fuji Tokoha University, 325 Ohbuchi, Fuji 417-0801, Japan;Department of Earth Sciences, Faculty of Science, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan;Nuclear Professional School, School of Engineering, The University of Tokyo, 2-4 Shirakatashirane, Tokaki-mura, Naga-gun, Ibaragi 319-1195, Japan;Faculty of Geo-Environmental Science, Rissho University, 1700 Magechi, Kumagaya 360-0194, Japan |
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Abstract: | Prompt gamma neutron activation analysis was applied to the determination of the titanium, potassium, samarium and gadolinium contents of nine Geological Survey of Japan (GSJ) reference materials (JB-1, 1a, 2, 3; JA-1, 2, 3; JR-1, 2). Firstly, the values in JB-1 were determined by the standard addition method: pressed powder disks of JB-1 were used for neutron irradiation and gamma-ray measurements, after known quantities of standard reagents had been added. Secondly, the contents of eight other reference materials were determined by comparison methods using JB-1 as the comparative standard. The precision of analyses were obtained by replicate determinations on these samples. The relative standard deviation was generally less than 5%. For most samples, analysed values agreed well (< 5%) with the recommended values. |
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Keywords: | prompt gamma neutron activation analysis GSJ igneous rock samarium gadolinium |
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