2-hydroxy-4-n-propoxy-5-bromoacetophenone oxime as an analytical reagent for gravimetric determination of v(v)

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ID: 175456
2009
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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.
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nair2009e-journal2-hydroxy-4-n-propoxy-5-bromoacetophenone Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Ambily P. Nair;J. Christine
Journal Journal of pharmaceutical and biomedical analysis
Year 2009
DOI
10.1155/2009/129832
URL
http://dx.doi.org/10.1155/2009/129832
Keywords
chemistry

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