ICP-AES With MSF for Determination of Th and U

This paper is mainly focused on the determination of trace element Th in U-base and trace element U in Th-base by ICP-AES. The interference elimination study was carried out by the method of MSF technology. At ratios of ρ(U)/ρ(Th) and ρ(Th)/ρ(U) is in the range of 200∶0.1 to 200∶1.0, the relative deviations are 0.33%-4.13%, 4%-10% at 401.913 nm of Th and 409.014 nm of U, respectively. It was concluded that this method is simple and reliable.