The determination of iodate in rain-water by neutron activation analysis is described. Iodate is separated by anion exchange.
The determination limit of I is 0.02 μg·L−1 for a 20 ml sample. The influence of the sea on the composition of rain-water is demonstrated by the analysis of coastal
rain-water. The results indicate that inorganic iodine (I2 and IO
) is enriched in filtered coastal rain-water relative to the composition of sea-water.