Rapid Semi-Micro Potentiometric Titration of Ir(IV) with Hydrazine Sulphate

Abstract

A rapid potentiometric titration of Ir(IV) with hydrazine sulphate is described. 1.0 mg, 0.25 mg and 0.10 mg are determined with precision of 0.5%, 0.8% and 3.0%, respectively. Most of the common ions do not interfere as well as Rh(III). Some determinations of Ir(IV) in ores were made with good precision and compared with a spectrophotometric method.

Keywords:

• Iridium
• potentiometric titration
• platinum metals
• hydrazine sulphate