ICP-AES Determination of Scandium in Mg-Sc Alloy

An ICP-AES method for the determination of Sc in Mg-Sc alloy was proposed. The sample was dissolved with HCl (1+1) solution and H2O2. The wavelength of 361.384 nm was selected as analytical spectral line for the determination of Sc. Linear relationship between values of emission intensity and mass concentration of Sc was obtained in the range within 20.00 mg·L-1, with detection limit (3s) of 2.9×10-4mg·L-1. Recovery and precision of the method were tested by analyzing 4 Mg-Sc alloy samples by standard addition method, giving values of recovery in the range of 98.0%-102.0% and RSD′s (n=6) in the range of 0.7%-1.8%.