Development of HCl-free analysis method of Cd using liquid scintillation counter

Ito, Chihiro; Tanaka, Yasuyuki ; Kurosawa, Kiyoko*; Motoki, Yoshiaki*; Do, V. K.  ; Furuse, Takahiro

In this presentation, an HCl-free analytical method for Cd in aqueous solution samples containing multiple radionuclides by liquid scintillation counting is reported. We aimed to develop a chemical separation procedure of Cd from co-existing nuclides such as Co and/or Fe, 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 (NaSO), 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.