Determination of 16 Trace Impurity Elements in Nuclear-Grade Sponge Zirconium and Zirconium Alloys by Inductively Coupled Plasma Mass Spectrometry

The sample (0.600 0 g) was wet in 10 mL of water, and dissolved in 5 mL of hydrofluoric acid and 5 mL of nitric acid. Water was added to the above solution to make the mass of solution attained to 60.0 g. The isotope with high sensitivity and small interference was selected, and the standard addition method was used to compensate the matrix effect in preparation of working curves. 16 impurity elements in nuclear-grade sponge zirconium and zirconium alloy were simultaneously determined by inductively coupled plasma mass spectrometry under the conditions of radio frequency power at 1 100 W and atomization gas flow rate at 0.87 L·min^-1. As shown by the results, values of detection limit (3s) for 16 elements were in the range of 0.007-0.26 μg·g^-1. The nuclear-grade zirconium sponge samples were determined 11 times, with RSDs of the determined values in the range of 2.2%-8.0%. Test for recovery was made by standard addition method, giving results in the range of 90.0%-111%.