Title of article :
Univariate and Multivariate Optimization of Spectrophotometric Determination of Europium (III) in Pure Form and Synthetic Sample
Author/Authors :
jasim, wasan abdil-wahid university of baghdad - college of education for pure science –ibn al haitham - department of chemistry, Iraq , mohammed, alaá kareem university of baghdad - college of education for pure science –ibn al haitham - department of chemistry, Iraq , atawi, rafiá kadori university of baghdad - college of education for pure science –ibn al haitham - department of chemistry, Iraq
Abstract :
Two different approaches, univariate and multivariate (simplex method), have been
used to obtain the optimum conditions for the quantitative Spectrophotometric determination
of Eu3+ using Solochrome violet RS (3-Hydroxy-4-(2-hydroxy phenyl azo) naphthalene -1-
sulfonic acid) (SVRS) as a chromogenic reagent. The investigation shows that Eu3+ ion forms
a wine-red complex with SVRS in alkaline buffer solution having a maximum absorbance at
464 nm against reagent blank.
Calibration graphs obtained under univariate and simplex were found to be linear in the
range of (0.30-8.0) µg/ml with detection limit 0.061µg/ml and molar absorptivity of 9877.66
L/mol.cm and (0.40-10.0)µg/ml with detection limit 0.055µg/ml and molar absorptivity of
10759.05 L/mol.cm respectively. The stoichiometric composition of the formed Eu-SVRS
chelate complex is 1:4 (Metal:Ligand). Effect of the presence of some metal ions as
interferences was studied and the method has been applied successfully to the determination
of cited ion in synthetic sample.
Keywords :
spectrophotometric , Solochrome Violet(SVRS) , Simplex , Lanthanides
Journal title :
Ibn Alhaitham Journal For Pure and Applied Science
Journal title :
Ibn Alhaitham Journal For Pure and Applied Science
