Liquid extraction of iodine (Monitoring of 131i in milk).
The laboratory for strontium and iodine measurements is responsible for the quantitative determination of strontium-90 (by measuring the activity of the daughter product yttrium-90) and iodine-131. These two radionuclides are with caesium-134 and -137 the main fission products which are formed during the uranium-235 fission. For this reason, these radionuclides are very good indicators in case of a possible contamination of the environment following an incident.
This method requires extensive chemical pre-treatment and separation of the radio-elements prior to measurement (i.e. ion chromatographic separation and liquid extraction).
Sample preparation and measurements are carried out in a dedicated laboratory using proportional counters.
Liquid extraction of iodine (Monitoring of 131i in milk).