Analysis of Metal Ions in Environmental Samples - III Synergistic Determination of Vanadium (V) As its Mixed Complex with N-0-Methoxyphenyl-2-Thenohydroxamic Acid and 3-(0-Carboxyphenyl)-1-Phenyltriazine-N-0Xide
- 1 January 1979
- journal article
- spectrometry
- Published by Taylor & Francis in Analytical Letters
- Vol. 12 (9) , 1027-1036
- https://doi.org/10.1080/00032717908059782
Abstract
A highly sensitive, selective, and rapid method for the spectrophotometry determination of vanadium(V) at trace levels is described. The method is based on the selective extraction of vanadium(v) from strongly acidic (3–6 M hydrochloric acid) met ium with solution of N-0-methoxyphenyl-2- thenohydroxamic acid (0MTHA) in chloroform. The extract is then equilibrated with 3-(0-carboxyohenyl)-1-phenyltriazine-N-oxide(CPPTNO) at pH ≃ 1.5 and the resulting colour is measured at 445 nm. The colour system obeys Beer's law over the range 0–20 -μg/ml of vanadium; the molar absorptivityat the wavelength of maximum absorption (445 nm), and the Sandell sensitivity of the method are 1.1 × 1041. mole−1 cm−1 and 0.005 μg/ml respectively.Keywords
This publication has 4 references indexed in Scilit:
- N-O-Methoxyphenyl-2-Thenohydroxamic Acid as a Reagent for Extraction and Spectrophotometry Determination of Vanadium(V)Analytical Letters, 1976
- Spectrophotometric determinations of iron(III), titanium(IV) and vanadium(V) and their separation from each other and from other ions with 1-(o-carboxyphenyl)-3-hydroxy-3-phenyltriazeneAnalytica Chimica Acta, 1969
- Spectrophotometric Methods of Establishing Empirical Formulas of Colored Complexes in SolutionJournal of the American Chemical Society, 1950
- Complex Ions. I. The Identification of Complex Ions in Solution by Spectrophotometric MeasurementsJournal of the American Chemical Society, 1941