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Iridium is one of the most chemically stubborn—and analytically important—precious metals. In this episode, we walk through key methods for getting iridium metal, oxides, and alloys into solution, including aqua regia, high-temperature chlorination, and fusion techniques. We also cover ICP-OES and ICP-MS testing considerations, including line selection, interference management, and typical detection limits.

The team also shares the story behind the development of IV’s SI-traceable Iridium PCRM, created to address the lack of a NIST SRM and reduce uncertainty for labs that depend on high-purity standards.