機器中性子放射化分析による高純度鉄標準物質中の微量元素の定量(機器分析)(<特集>最先端の化学分析と物理解析)

概要

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Trace elements in high purity iron certified reference materials, JSS001-4 and JSS003-4, prepared by the Iron and Steel Institute of Japan were determined by instrumental neutron activation analysis (INAA). Five or seven aliquots of each sample (ca. 130∿750mg) were irradiated for a short time (2 min) at a thermal neutron flux of 1.5×10^<12>n cm^<-2>s^<-1> (pneumatic transfer) and for a long time (6 h) at a thermal neutron flux of 3.7×10^<12>n cm^<-2>s^<-1> (cental thimble) in the Rikkyo University Research Reactor. The irradiated samples were measured by conventional γ-ray spectrometry using a coaxial Ge detector, and by anticoincidence γ-ray spectrometry with a coaxial Ge detector and a well-type NaI (Tl) detector. The concentrations of 7 elements (Na, Cl, V, Co, Zn, As, W) in the JSS001-4 and 11 elements (Na, Al, V, Mn, Co, Ni, Cu, As, Mo, Sb, W) in the JSS003-4 were determined by these methods. The determined values were in good agreement with the certified and reference values. The lower limit of determination values for Sm, Ir, Au in the JSS003-4 were 0.1∿1 ng/g.
社団法人日本鉄鋼協会の論文
1999-02-01