Iodine-129 Applications129I is used as a tracer substance to help determine the impact of nuclear reactions on neighboring surroundings. 129I is biophilic and therefore is often concentrated in plants or soils with a high organic content.
129I can be used in the identification of very old waters by correlating the amount of natural 129I or its 129Xe decay product. It can also be used in the identification of younger bodies of water due to the increased anthropogenic 129I levels due to nuclear reaction fallout. The following is a list of applications of 129I analysis:
- estimation of groundwater residence time
- tracing of brine migration
- identification of hydrocarbon source rocks
- tracing the movement of radioactive contaminant plumes
Extraction Procedures129I extraction from aqueous samples follows modified procedure of the one outlined by J. Kleinberg and G. Cowan, The Radiochemistry of Fluorine, Chlorine, Bromine, Iodine, Los Alamos National Laboratory where the final product precipitated as AgI is pressed into a target and analyze on the HVE 3MV Tandetron.
For the 129I extraction from solid materials, an alkali fusion technique is used and its based on the technique describe by Nishizumi et al (Nature 305(1983)).