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Spectrophotometric Determination of Palladium by the Coloration with 2-Mercaptoethanol

Author Affiliations

  • 1Department of Chemistry, Dr. M.V. Shetty Institute of Technology (Visvesvaraya Technological University), Moodbidri, Mangalore-574225, Karnataka, INDIA
  • 2 Department of Chemistry, Srinivas Institute of Technology (Visvesvaraya Technological University), Valachil, Mangalore- 574 143, Karnataka, INDIA

Res.J.chem.sci., Volume 5, Issue (9), Pages 19-26, September,18 (2015)


A simple and highly sensitive method is proposed for the determination of palladium with 2-mercaptoethanol using spectrophotometer. The Pd(II) formed1:2, a yellow colored complex with 2-mercaptoethanol in a buffer(potassium hydrogen phthalate-hydrochloric acid) of pH 4. The detection limit and quantitation limit of the palladium(II) determination are found to be 0.396 μg cm-3 and 1.200 μg cm-3 respectively. The Beer’s law obeyed over the concentration range 1.39-8.36 µg cm-3 of palladium(II). The optimum concentration range for maximum precision was deduced from Ringbom’s plot and was found to be 2.79-8.36 µg cm-3. The molar absorptivity and Sandell’s sensitivity of the complex were found to be 2.2634 x 104 dm3 mol-1cm-1 and 7.2154 x 10-3 µg cm-2, respectively. The absorbance value of the complex was not effected by the presence of various cations and anions. The investigated method was applied for the determination of Pd(II) in alloy and catalyst samples.


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