The effect of carriers on the chemical behavior of I 3 I I produced from the 130Te(n, 7)l3ITe --fIa1I processes was investigated with paper electrophoresis, autoradiography and au ray spectrometry.If no carrier was added, the chromatograms of the iodine species revealed significant deposits of an unexpected chemical species between the spots of the iodide and iodate species. The addition of either iodate or periodate as carrier converted the species into iodate in the former case, and into iodate and periodate in the latter.Referring to the already known exchange reactions between different iodine species, hence was concluded that the species observed in the experiment without carrier was the iodite species (IO;), as surmised by previous authors.is discussed based on the experimentally obtained data and referring to the already known exchange reactions between different iodine species(7xs).