| Budget Amount *help |
¥7,100,000 (Direct Cost: ¥7,100,000)
Fiscal Year 1986: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1985: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1984: ¥5,600,000 (Direct Cost: ¥5,600,000)
|
|---|
| Research Abstract |
The newly developed three internal standard methods, i.e., the stable isotope dilution activation analysis, the internal standard and internal reference methods for activation analysis, have the greate advantages that the comparative standard spiked with interesting elements has the same matrix as the sample, and that the absolute concentrations of the interesting elements can be evaluated easily by using very simple equations even when the sample and comparative standard are irradiated separately by particles with different flux. In order to demonstrate the usefulness of the above methods, in the present studies several fundamental and applied experiments have been tried successively as follows. (1) developement of the stable isotope dilution activation analysis in which the self-shielding effect is negligible, and its application by means of photon activation; (2) determination of strontium in biological materials by charged-particle activation analysis using the stable isotope dilution method; (3) simultaneous determination of Ti, Cr, Fe, Cu, Ga and Zr in aluminiun alloys by charged-particle activation analysis using the internal standard method; (4) simultaneous determination of Ca, Rb, Sr and Ce in environmental materials by photon activation analysis using the stable isotope dilution method; (5) highly accurate and precise multielement determination of environmental samples by means of photon activation using the internal standard method; (6) instrumental photon activation analysis of environmental materials using the internal standard method. In consequence, it was proved that the highly accurate and precise determinations of interesting elements in a wide variety of materials can be achieved effectively and favourably by using the above each method. Through these experiments, it was also suggested that each method plays an important role as a very valuable multielement technique for all sorts of activation analysis.
|
