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Title: A rapid spectrophotometric method for the determination of molybdenum using ferron in industrial and environmental samples
Authors: Kumar, Anil
Dass, Rameshwar
Issue Date: Oct-2008
Publisher: CSIR
Series/Report no.: Int. Cl. ⁸ G01N21/25
Abstract: Ferron has been used as an analytical reagent for the extractive spectrophotometric determination of molybdenum(V) obtained from the reduction of molybdenum(VI) with ascorbic acid. Molybdenum(V) in presence of a large number of cations, anions and complexing agents forms a yellow complex with ferron that is quantitatively extractable into tri-n-octylamine-chloroform from 1 M H₂SO₄ medium. The complex is stable for at least 24 h and shows an absorption maximum at 425 nm with molar absorptivity and Sandell’s sensitivity of 3.96×10³ l mol⁻¹ cm⁻¹ and 0.02525 μg cm⁻² Mo(V), respectively. The method obeys Beer’s law up to 31 μg ml⁻¹ Mo(V). For ten replicate determinations of 10 μg ml⁻¹ Mo(V), the relative standard deviation is found to be 0.54%. The method is simple, selective, precise and rapid, and has been satisfactorily applied to the determination of molybdenum in aqueous, synthetic and technical samples of diverse matrices.
Description: 1533-1536
ISSN: 0376-4710
Appears in Collections: IJC-A Vol.47A(10) [October 2008]

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