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Solvent Extractioh and Spectrophotometric Determination of Cobalt( III) and Iron( III) with N-Hydroxy-N ,N '-Diphenylbenzaihdine in Presence of Azide.

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dc.contributor.advisor Chandravanshi B.S. (PhD)
dc.contributor.author Moges Ghirma
dc.date.accessioned 2018-06-19T09:39:13Z
dc.date.available 2018-06-19T09:39:13Z
dc.date.issued 1982-06
dc.identifier.uri http://etd.aau.edu.et/handle/123456789/1616
dc.description.abstract N-'Hydroxy-N ,N' -diphenylbenzamidine (HDPBA)" a bidentate chelating agent, reacts with cobalt(III) and ironeIII) in the p,resence of azide to give a pinkish red and red-violet coloured mixed ligand complexes, which are quantitatively extractable into chloroform from the aqueous phase at pH 7.4-7.8 and 2-5 respectively,. allowing spectropJiotometric determinations of the metal ions. The cobalt(III) and iron(III) mixed ligand complexes have wavelengths of maximum absorption at 520 and 520-540 run with their respective molar absorptivities of 1980 lit. mole-l cm-l and 4895 lit. mole-I cm-l • Beer's Law obeys from 3.6 to 24 ppm for cobalt(III) and from 1.6 to 11.2 ppm for iron(III). The effect of foreign ions and several other experimental variables have been studied., The composition of the cobalt(III) and iron(rII) mixed ligand complexes have been determined by spectrophotometric methods- and ilre found to be 1:1:2 (Co: HDPBA:N:3) and 1:2:2 (Fe:HDPBA:l{'3) respectively. On the basis of the differences in the pH of the react'ion media for irone III) and cobal t( III), a separation procedure for the two metals in a solution has been established folloHed by spectrophotometric determinations. The method has allowed the separntion and determination of varied proportions of ironeIII) and cobalt(III) in a solution of the two metal ions. ,Moreover, the methods have been applied successfully for the separation and determination of cobalt and iron in synthetic samples.a solution of the two metal ions. Moreover, the methods have been apr;lied successfully for the separation and determination of cobalt and iron in synthetic samples en_US
dc.language.iso en en_US
dc.publisher Addis Ababa Universty en_US
dc.title Solvent Extractioh and Spectrophotometric Determination of Cobalt( III) and Iron( III) with N-Hydroxy-N ,N '-Diphenylbenzaihdine in Presence of Azide. en_US
dc.type Thesis en_US


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