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Extractive- Spectrophotometric Determination of Fe(II), Fe(III), Mn(II) and Cr(III) through complexation with 2,2I-ethylenebis (nitrilomethylidene) diphenol (H2EBNMDP)

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Author Affiliations

  • 1Department of Industrial Chemistry, Ebonyi State University, PMB 053, Abakaliki, NIGERIA

Res.J.chem.sci., Volume 5, Issue (5), Pages 46-51, May,18 (2015)

Abstract

Solvent extraction using 2,21-ethylenebis(nitrilomethylidene)diphenol as ligand has been investigated for the spectrophotometric determination of Fe(II), Fe(III), Mn(II) and Cr(III). The complex formed by HEBNMDP with the Fe(II), Fe(III), Mn(II) and Cr(III) ions were stable in water for pH 8, 4, 6 and 6 respectively with a maximum of absorption at 366nm, 383nm, 415nm 405nm and molar absorptivity (Epsilon) 1.84 x 104, 2.29 x 104, 2.96 x 104 and 3.85 x 104 respectively. The combination ratio has been established using the logarithmic method to be 1:2, 1:1, 1:2 and 1:1 for Fe(II), Fe(III), Mn(II) and Cr(III) respectively. The proposed method was applied successfully in the determination of Fe(II), Fe(III), Mn(II) and Cr(III) from tap water and synthetic samples.

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