Abstract
NEW ANALYTICAL TECHNIQUE FOR DETERMINATION OF TRACE AMOUNT OF FE (III) BY USING UV-VISIBLE SPECTROPHOTOMETRIC METHOD WITH PHOTOMETRIC REAGENT

V. S. More*, R. S. Lokhande1, S. P. Janwadkar2, D. K. Yadav, P. K. Rana, C. Y. Patil, C. L. Pamale and Y. K. Patil

ABSTRACT

3-nitrosalicylaldehyde thiosemicarbazone (3-NSTS) is proposed as a new photometric reagent for the extractive spectrophotometric determination of Fe (III) (3-NSTS) reacts with Fe (III) and form a stable coloured complex in the pH range 2.0 to 3.0.This was well extracted in n-butanol. The absorption spectrum of Fe (III) (3-NSTS) complex in n-butanol shows maximum absorbance at 380 nm. The system obeyed Beer’s law up to 2-10 μg / cm3. The molar extinction coefficient was found to be 3.957 x 103 lit mol-1cm-1 and the sensitivity of the method as defined by Sandell’s sensitivity was 3.33 x 10-2 μg/cm2. The composition of the extracted species was determined by Job’s Continuous variation method, Mole ratio method and slope ratio method and it was found to be 1:2. The proposed reagent is satisfactorily applied for the determination of trace amount of Fe (III) from industrial waste water as well as synthetic and commercial samples.

Keywords: Iron,n-butanol,3-Nitro-salicylaldehyde thiosemicarbazone derivative(3-NSTS) etc.


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