The distribution of radioiodine (131I) species in rain water collected at Tsukuba in May 1986 was studied using the isotopic exchange method. Organic-soluble forms of radioiodine were not observed. Iodide (I*-) was the predominant species, and the concentration of iodate (I*O3-) was less than half of I*-. The results were compared with those for 131I produced by neutron-irradiation of uranyl nitrate. © 1988.
Seki, R., Endo, K., & Ikeda, N. (1988). Determination of radioiodine species in rain water collected at Tsukuba near Tokyo. Journal of Environmental Radioactivity, 6(3), 213–217. https://doi.org/10.1016/0265-931X(88)90077-X