Laboratory of Radiochemistry
Department of Chemistry
University of Helsinki
Here the learning goals and purpose of the exercise should be presented in a reasonable way.
239,240Pu, 238Pu and 241Am in the environment originate mainly from atmospheric nuclear weapons tests in the 1950-1960’s. 241Am is a daughter nuclide of 241Pu, and its amount increases constantly in the environment due to decay of the parent.
Extraction chromatography combines efficiency and selectivity of solvent extraction and convenience of chromatographic resin. Water solution is the mobile phase and the stationary phase is organic solvent that is attached to an inert support polymer. Benefits of extraction chromatography compared to ion exchange are smaller waste amounts (acid solutions) and faster analysis.
Eichrom/Triskem's UTEVA resin is designed for separation of uranium and tetravalent actinides. TRU resin is used to separate transuranium nuclides.
• 0.25 g of sediment sample is weighed into a beaker
• 243Am and 242Pu yield determinant tracers are added (2-3 dpm)
• 15 mL of concentrated HNO3 and 5 mL of concentrated HCl is added and the mixture is gently heated on a hot plate for 2 h
• The solution is filtered through a glass fibre filter and the solution is evaporated to dryness
Separation of Pu and Am from U and Th
Separation of Plutonium and Americium from each other
Co-precipitations for counting source preparations
Here the safety aspects of the exercises should be written. Because of the different rules in different countries this will probably never be correct for every user. It should at least contain HMDS for the chemical compounds used or relevant links to used equipment.
Description of the equipment needed and used during the exercises.
The preparation that the lab Supervisor needs to do to ready the lab.
Here there should be a link to a open page where people who have used the exercise can leave feedback. How the exercises worked and troubles in performing it.