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Updated: Jun 28, 2026

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
Determination of vanadium by solid-phase spectrophotometry after its preconcentration as an Eriochrome Cyanine R
S Boudra1, J M Bosque-Sendra, M C Valencia
1Department of Analytical Chemistry, Faculty of Sciences, University of Granada, 18071 Granada, Spain.
Abstract:
A method is described for the determination by solid phase spectrophotometry (SPS) of trace amounts of vanadium in natural water and crude petroleum samples. The procedure is based on fixation on a dextran-type anion exchanger of the complex V(IV)-Eriochrome Cyanine R. The absorbance of the gel, at 563 and 750 nm, packed in a 1 mm cell, is measured directly. Vanadium can be determined in the 0.6-25.0 mug l(-1) range with a relative standard deviation of 2.2%. The comparison of the SPS method and the gallic acid persulphate method shows that the linearity, analytical sensitivity and precision were better for the SPS method, and that the latter method has lower detection and quantification limits than the gallic acid persulphate method.
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