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2-Hydroxy-4-n-propoxy-5-bromoacetophenone oxime as an Analytical Reagent for Gravimetric Determination of V(V)
- Source :
- Journal of Chemistry; 2009, Vol. 6 Issue: 1
- Publication Year :
- 2009
-
Abstract
- 2-Hydroxy-4-n-propoxy-5-bromoacetophenone oxime (HnPBAO) was developed as a new analytical reagent for the gravimetric determination of pentavalent vanadium ion. In the pH range 4.0-6.0, the reagent gave a brown coloured precipitate with V(V). Job’s method and Mole ratio method revealed that the stoichiometry of the complex is 1:1 (metal: ligand). Beer’s law is obeyed up to 20.38 ppm of V(V). Molar absorptivity and Sandells sensitivity at 450 nm were found to be 10.22 × 102L/mol/cm and 0.049 µg/cm2 respectively. The stability constant of V(V)-HnPBAO complex is found to be 1.195 × 106. Gibb’s free energy change for complex formation reaction was found to be –8.34 kcal/mol. The reagent can be used for the analysis of vanadium in ferro-vanadium alloys.
Details
- Language :
- English
- ISSN :
- 20909063 and 20909071
- Volume :
- 6
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Journal of Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs28402217
- Full Text :
- https://doi.org/10.1155/2009/129832