Investigation of the extraction equilibrium of ion-association complexes of molybdenum (VI) with some polyphenols and thiazolyl blue. extraction-spectrophotometric determination of molybdenum |
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| Authors: | Atanas N Dimitrov Vania D Lekova Kiril B Gavazov Boyan S Boyanov |
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| Institution: | (1) Department of General and Inorganic Chemistry, Plovdiv University, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria;(2) Department of Chemical Technology, Plovdiv University, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria |
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| Abstract: | 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. |
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| Keywords: | Molybdenum Tefrazolium salts Extraction-Spectrophotometry Polyphenols |
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