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Current Analytical Chemistry
ISSN (Print): 1573-4110
ISSN (Online): 1875-6727
DOI: 10.2174/15734110113099990013      Price:  $58

Improvised Response in 1,4 Dioxane as Co-solvent During Selective Determination of Cerium (III) in Binary Mixtures by Conductometry

Author(s): Komal Matharu, Ashok Kumar SK and Susheel K Mittal
Pages 505-511 (7)
The influence of different protic and aprotic solvents on the conductometric titrations of cerium(III) with EDTA has been studied. The results are explained for mixed solvent systems using 1,4-dioxane (DA), acetonitrile (ACN), Dimethylsulphoxide (DMSO), N,N’-dimethylformamide (DMF), Tetrahydrofuran (THF) and Methanol (MA) as cosolvents. End points of conductometric titrations improved in presence of 1,4 dioxane as a co-solvent (in comparison to that in aqueous medium) for binary mixtures of Ce(III) with Al(III), Cu(II), Mn(II) and Pb(II), respectively. Composition of co-solvent-solvent medium has been optimized for best conductometric titration results. On the basis of synergic effect of dielectric constant, proton affinity and extent of solvation relative order of co-solvents showing increasing effect has also been proposed. It is now possible to determine Ce(III) in presence of Al(III) without interference in aqueous medium in presence of 20% 1,4 dioxane.
Graphical Abstract:
Aprotic solvent, Cerium (III), Conductometry, Co-solvent, EDTA, Protic solvent, determination, binary mixture.
School of Chemistry & Biochemistry, Thapar University, Patiala, 147004, India.