Spectrophotometric Determination of Ir(III) with Leucine in Alkaline Medium

摘要

Background: A kinetic spectrophotometric method based on Ir (III) catalyzedthe oxidation of leucine by hexacyanoferrate (III) in the aqueous alkaline medium has beendeveloped for 0.99 μgcm-3 to 19.98 μgcm-3 determination of Ir(III).Method: Molar absorptivity (1.05×103 to 1.50×103 Lmol-1cm-1), Sandell’s sensitivity(0.183 to 0.128 μgcm-3), correlation coefficient (-0.9872 to 0.9957) and effect of selectedinterferences have been worked out for developing the calibration curves in terms ofabsorbance or initial rate or pseudo-first-order rate constant vs. Ir(III) plot.Conclusion: The method is simpler, more sensitive with improved detection limits incomparison to other reported methods and is useful in absence of expected interferants.