Kinetic Spectrophotometric Method for The Determination of Ir(III) by Its Catalytic Effect on The Oxidation of Sulphur Containing Amino Acid by HCF(III) in Aqueous Alkaline Medium

Authors

  • Dr. Anjali Goel  Deparment of Chemistry, Kanya Gurukul Mahavidyalaya, Gurukul Kangri University Haridwar, Uttarakhand, India
  • Dr. Savita Garg  Deparment of Chemistry, SEA college of Arts, Science and Commerce, K.R.Puram, Bangalore, Karnataka, India

Keywords:

Microgram determination, Ir (III), Hexacyanoferrate (III), Oxidation, Cystine and Methoinine

Abstract

A simple kinetic spectrophotometric method has been developed for the determination of ultra trace amount of Ir(III).The method is based on the Ir(III) catalysed oxidation of sulphur containing amino acid by HCF(III) in aqueous alkaline medium. Under the optimum experimental conditions Ir (III) can be determined in the range 0.258 -8.37µg ml-1 for cystine and methionine with an maximum average error of 99.5% and maximum relative standard deviation of 1.702%.The effect of few interfering ions have been worked out .For developing the calibration curves in terms of absorbance or reaction rate or pseudo first order rate constant vs. [Ir (III)] plot, absorbance was noted at λmax of 420 nm. The molar absorptivity and sandell’s sensitivity are found for cystine 2.83 x 103 – 4.11 x 103 l mol-1 cm-1 & 0.0680 – 0.0467µgcm-2 and for methoinine 2.31 x 103 – 3.27 x103 l mol-1cm-1 & 0.0834 – 0.0588µgcm-2 respectively. The results show that the present method is more simple and sensitive than the reported methods and especially useful in absence of expected interfering ions.

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International Journal of Scientific Research in Science and Technology

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Published

2021-01-20

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Volume 8, Issue 2, January-February-2021

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Research Articles

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[1]
Dr. Anjali Goel, Dr. Savita Garg "Kinetic Spectrophotometric Method for The Determination of Ir(III) by Its Catalytic Effect on The Oxidation of Sulphur Containing Amino Acid by HCF(III) in Aqueous Alkaline Medium" International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011,Volume 8, Issue 2, pp.17-24, January-February-2021.