European Journal of Biomedical and Pharmaceutical Sciences

DEVELOPMENT OF EXTRACTIVE SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF MANGANESE (II) WITH SCHIFF BASE 2-[(2- HYDROXYPHENYLIMINO) METHYL]-4-NITROPHENOL

Datta B. Mandhare and Vasant D. Barhate*

ABSTRACT

A simple spectrophotometric method has been developed for the determination of Manganese (II) by using Schiff base 2-[(2-hydroxyphenylimino) methyl]-4-nitrophenol [HPIMNP]. HPIMNP extracts Mn (II) quantitatively (99.78%) into n-Butyl alcohol from an aqueous solution of pH range 10.0-11.0. The n-Butyl alcohol extracts show maximum absorption at 485 nm (λ max). Beer’s Law is obeyed over the Mn (II) concentration range of 0.1 to 8.0 μg/ ml. The Molar absorptivity and Sandell’s sensitivity for Mn – HPIMNP system is 10998.08 L mol –1 cm–1 and 0.005μg.cm-2 respectively. The composition of extracted species is found to be 1: 2 [Mn - HPIMNP] by Job’s continuous variation and Mole - ratio method. Interference by various ions has been studied. The proposed method is rapid, sensitive, reproducible and accurate and it has been satisfactory applied for determination of Manganese in Ore and Alloy samples.

Keywords: Solvent Extraction, Extractive Spectrophotometry, Manganese (II), Schiff base, 2-[(2- hydroxyphenylimino) methyl]-4-nitrophenol [HPIMNP], Ores, Alloy sample.