| After the sample of nickel-platinum alloy was digested in the mixture of hydrochloric acid and nitric acid, seventeen impurity elements were determined by inductively coupled plasma mass spectrometry (ICP-MS). The analysis of Mg, Al, Ti, Cr, Mn, Co, Zn, Cu, Zr, Pd, Ag, Sn, Sm and Pb was performed by using the normal mode whereas the measurement of Si and Fe were carried out by using NH3 as the reaction gas at a flow rate 0.2 and 25 mL/min, respectively. Finally, V content was analyzed by choosing He as the reaction gas at a flow rate of 5 mL/min. The effect of the matrix on the determination was investigated. Internal standard method was used to improve the accuracy. Sc was selected as an internal standard for correcting Mg, Al, Ti, Cr, V, Mn, Fe, Co, Zn, Si, and Y for Cu, Zr, Pd, Ag, Sn, and Re for Sm and Pb. The linear correlation coefficient (r) was larger than 0.9997. The detection limits were 0.0025 ~0.78 ng/mL, and the recoveries of standard addition were 89.0%~116.5%. The relative standard deviation (RSD) was found to be 0.86%~13.07% for all 17 elements. The method developed in this work can be applied to the analysis of Ni-Pt alloy target materials. |
