1. (1) M. Ozawa, Y. Sano, Ch. Ohara, and T. Kishi, Nucl. Technol. 130, 196 (2000).
2. (2) K. Koizumi, M. Ozawa, and T. Kawata, J. Nucl. Sci. Technol. 30, 1195 (1993).
3. (3) N. Boukis, The Chemistry of Technetium, Report KfK 4362 (1988).
4. (4) V. I. Spitsyn, A. F. Kuzina, A. A. Oblova, M. I. Glinkina, and L. I. Stepovaya, J. Radioanal. Chem. 30, 561 (1976).
5. (5) C. E. Crouthamel, Anal. Chem. 29, 1756 (1957) ; J. Garraway and P. D. Wilson, J. Less-Common Metals 97, 191 (1984).