1. Special Research Committee on the Application of Neutron Activation Analysis to Environmental Samples, Research Reactor Institute, Kyoto University
2. Department of Chemistry, University of Tokyo
3. Research Reactor Institute, Kyoto University
4. Kobe Women's College of Pharmacy
5. Radiation Center of Osaka Prefecture
6. Depart-ment of Chemistry, Konan University
7. The Osaka Prefective Institute of Public Health
8. Tokyo Metropolitan Isotope Research Center
9. The Instutite for Atomic Energy, Rikkyo University
10. Faculty of Engineering, Keio University
11. Japan Atomic Energy Research Institute