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Journal

2005 | 3 | 4 | 747-755

Article title

Investigation of the extraction equilibrium of ion-association complexes of molybdenum (VI) with some polyphenols and thiazolyl blue. extraction-spectrophotometric determination of molybdenum

Content

Title variants

Languages of publication

EN

Abstracts

EN
The extraction process of ternary ion-association complexes of molybdenum (VI) with some polyphenols (4-nitrocatechol, 2,3-dihydroxy naphthalene) and thiazolyl blue has been investigated by using an extraction-spectrophotometric method. The optimum conditions for their quantitative preparation in aqueous medium and subsequent extraction into an organic solvent have been found. The extraction, distribution and association constants, and the recovery factors have been calculated. The composition of the complexes has been determined. A precise, sensitive and simple extraction-spectrophotometric method for determination of molybdenum in products from ferrous metallurgy has been developed.

Publisher

Journal

Year

Volume

3

Issue

4

Pages

747-755

Physical description

Dates

published
1 - 12 - 2005
online
1 - 12 - 2005

Contributors

  • Department of General and Inorganic Chemistry, Plovdiv University, 24 Tsar Assen Str., 4000, Plovdiv, Bulgaria
author
  • Department of General and Inorganic Chemistry, Plovdiv University, 24 Tsar Assen Str., 4000, Plovdiv, Bulgaria
author
  • Department of General and Inorganic Chemistry, Plovdiv University, 24 Tsar Assen Str., 4000, Plovdiv, Bulgaria
author
  • Department of Chemical Technology, Plovdiv University, 24 Tsar Assen Str., 4000, Plovdiv, Bulgaria

References

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  • [7] A. Dimitrov, S. Kostova and A. Alexandrov: “Extraction-spectrophotometric study of the ion-association complexes of germanium(IV) with 4-nitrocatechol and 2,3,5-triphenyltetrazolium chloride”, Anal. Lab., Vol. 7, (1998), pp. 20–23.
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  • [9] A. Dimitrov and S. Kostova: “Extraction-spectrophotometric study of germanium(IV) ion-association complexes with 4-nitrocatechol and thiazolyl blue”, Bulg. Chem. and Industry, Vol. 70, (1999), pp. 88–90.
  • [10] A. Dimitrov, S. Kostova, J. Pancheva and V. Lekova: “Extraction spectrophotometric studies of the ion association complex of molybdenum(VI) with 4-nitrocatechol and Tetrazolium violet”, Bulg. Chem. and Industry, Vol. 73, (2002), p. 20.
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  • [14] K. Gavazov, Zh. Simeonova and A. Alexandrov: “Extraction-Spectrophotometric Study of the System Vanadium(V)- Pyrogallol-Iodo-nitro-tetrazolium Chloride -Water-n-Butanol”, Russian J. Inorg. Chem., Vol. 46, (2001), pp. 427–431.
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  • [16] A. Hrdlicka and M. Vrchlabsky: “Complex equilibria of molybdenum (VI) with 2,3-dihydroxynaphtalene”, Mikrochim. Acta, /Wien/, Vol. 2, (1989), pp. 55–59. http://dx.doi.org/10.1007/BF01244517[Crossref]
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  • [18] M. Bartusek: “Molybdän(VI)- and Wolfram (VI)-Chelate mit Diphenolen”, Collect. Czech. Chem. Commun., Vol. 38, (1973), pp. 2255–2267. [Crossref]
  • [19] B. Grebenova and M. Vrchlabsky: “Extraktion und Spektrophotometrische molybdänbestimmung im Dreikomponentenkomplex mit brenzeatechin und alkyltriphenylphosphoniumkation”, Collect. Czech. Chem. Commun., Vol. 38, (1973), pp. 379–393. [Crossref]
  • [20] W. Likussar and D. Boltz: “Theory of Continuous Variations Plots and a New method for Spectrophotometric Determination of Extraction and Formation Constants”, Anal. Chem., Vol. 43, (1971), pp. 1265–1273. http://dx.doi.org/10.1021/ac60304a006[Crossref]
  • [21] V.N. Muzgin, L.B. Hamzina, V.L. Zolotovin and I.Ya. Bezrukov: Analytical Chemistry of Vanadium, Nauka, Moscow, 1981, p. 36.
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  • [24] B.F. Quin and R.R. Brooks: “The rapid colorimetric determination of molybdenum with dithiol in biological, geochemical and steel samples”, Anal. Chim. Acta., Vol. 74, (1975), pp. 75–84. http://dx.doi.org/10.1016/S0003-2670(01)82781-1[Crossref]

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_BF02475202
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