Open AccessHighly Selective Derivative Spectrophotometric Determination of Vanadium(V) in Steels, Minerals and Soil Samples
Author(s) -
Anitha Varghese,
A. M. A. Khadar
Publication year - 2008
Publication title -
mapana journal of sciences
Language(s) - English
Resource type - Journals
ISSN - 0975-3303
DOI - 10.12723/mjs.12.2
Subject(s) - vanadium , molar absorptivity , reagent , derivative (finance) , titanium , metal ions in aqueous solution , chemistry , ion , metal , nuclear chemistry , inorganic chemistry , analytical chemistry (journal) , materials science , environmental chemistry , physics , organic chemistry , financial economics , optics , economics
A simple, selective and sensitive spectrophotometric method has been developed for the determination of trace amounts of Vanadium(V) in acetic acid medium using a newly synthesized reagent acetoacetanilide salicyloylhydrazone (AASH). The molar absorptivity and Sandell's sensitivity of the coloured species were found to be 1.20 x 104 L mol-1cm-1 and 4.2 ng cm-2 respectively. Beer's law is obeyed in the range 0.3 -3.0μ.g mL-1 of vanadium (V) at 405 nm. The stochiometry of the complex was found to be 1:1 (V (V): AASH). A highly selective first order derivative spectrophotometric method for the determination of vanadium is also reported. A calibration graph was derived by measuring first derivative amplitudes at 430 nm (trough depth). The metal ions which are normally associated with vanadium in minerals and alloys do not interfere. The developed procedure has been successfully applied for the trace level determination of vanadium in steels, minerals and soil samples.