Abstract
It is well known that Ir is a chemically stable element that is difficult to dissolve even in a strong acid. Furthermore, when transition metals are added to it, Ir becomes more difficult to dissolve in acid. To solve this problem, we tried to dissolve Ir alloys including several transition metals using a fusion method at 800°C in sodium peroxide. We found that, when the powder size of a sample was sufficiently small, under 75 μm, Ir alloys could be dissolved. We also showed that it is possible to analyze the composition of Ir alloys using the solution with ICP-AES.
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