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

[ Vol. 8 , Issue. 4 ]


Shakunj Rajput * and Anjali Goel   Pages 303 - 308 ( 6 )


Background: A kinetic spectrophotometric method based on Ir (III) catalyzed the oxidation of leucine by hexacyanoferrate (III) in the aqueous alkaline medium has been developed 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 selected interferences have been worked out for developing the calibration curves in terms of absorbance or initial rate or pseudo-first-order rate constant vs. Ir(III) plot.

Conclusion: The method is simpler, more sensitive with improved detection limits in comparison to other reported methods and is useful in absence of expected interferants.


Hexacyanoferrate, iridium, leucine, oxidation, superconductor, corrosion.


Department of Chemistry, Pt. L.M.S. Govt. P.G. College, Rishikesh, Dehradun, Uttarakhand, Department of Chemistry, Kanya Gurukul Campus, Gurukul Kangri Vishwavidyalaya, Haridwar

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