[3D04-07] Analytical Technique 1

[3D06] Development of HCl-free Analysis Method of ^113mCd Using Liquid Scintillation Counter

*Chihiro Ito¹, Yasuyuki Tanaka¹, Kiyoko Kurosawa¹, Yoshiaki Motoki¹, Van-Khoai Do¹, Takahiro Furuse¹ (1. JAEA)

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.