11:20 AM - 11:35 AM
[3D06] Development of HCl-free Analysis Method of 113mCd Using Liquid Scintillation Counter
Keywords:113mCd, Radiochemical analysis, Solid phase extraction
In this presentation, an HCl-free analytical method for 113mCd in aqueous solution samples containing multiple radionuclides by liquid scintillation counting is reported. We aimed to develop a chemical separation procedure of 113mCd from co-existing nuclides such as 60Co and/or 55Fe, which interfere with the beta-counting. The use of hydrochloric acid (HCl) was avoided to prevent facilities from corrosion. Accordingly, after a sample-matrix separation with a chelating disk, Cd was adsorbed on a cation exchange resin and then selectively eluted by sodium thiosulfate (Na2S2O3), which has a high affinity for Cd. This developed method allowed the separation and purification of Cd from the sample matrix without the use of halogen acids.