The solvent extraction and spectrophotometric determination of vanadium (V) with 4-(2-thiazolylazo)resorcinol and tetrazolium salts

• Authors: Kiril Gavazov , Vanya Lekova , Atanas Dimitrov , Georgi Patronov
• Languages of publication: EN

Abstracts

EN

The formation and extraction of ion-associate complexes between the vanadium(V)-4-(2-thiazolylazo)resorcinol (TAR) anionic chelate and the cations of some mono-and ditetrazolium salts {3-(4,5-dimethyl-2-thiazol)-2,5-diphenyl-2H-tetrazolium bromide (Thiazolyl blue, MTT), 3-(2-naphtyl)-2,5-diphenyl-2H-tetrazolium chloride (Tetrazolium violet), 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium chloride (Iodonitrotetrazolium chloride), 3,3′-[3,3′-dimetoxy(1,1′-biphenyl)-4,4′-diyl]-bis[2,5-diphenyl-2H-tetrazolium] chloride (Tetrazolium blue chloride) and 3,3′-(3,3′-dimetoxy-4,4′-biphenylene)bis[2-(4-nitrophenyl)-5-phenyl-2H-tetrazolium chloride] (Nitro blue tetrazolium chloride)} have been studied. The optimum extraction conditions have been found. The composition of the V-TAR-monotetrazolium and V-TAR-ditetrazolium complexes extracted into chloroform has been determined to be 1:2:3 and 2:4:3 respectively. The extraction, distribution and association constants, and the recovery factors have been calculated. The relationship between the molecular weight of tetrazolium cations, and the association constants of their complexes has been discussed. The special behavior of the tetrazolium cations, containing-NO2 groups has been noticed. The effects of foreign ions and reagents on the extraction of vanadium with TAR and the best tetrazolium salt-MTT have been studied. A sensitive, selective, simple and fast method for the determination of vanadium has been developed. [...]

Keywords

EN

Vanadium; 4-(2-Thazolylazo)resorcinol; tetrazolium salts; extractive spectrophotometric determination

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2007
• Volume: 5
• Issue: 1
• Pages: 257-270

Dates

published

1 - 3 - 2007

online

1 - 3 - 2007

Contributors

author

Kiril Gavazov

• Department of General and Inorganic Chemistry, Plovdiv University, 4000, Plovdiv, Bulgaria

author

Vanya Lekova

• Department of General and Inorganic Chemistry, Plovdiv University, 4000, Plovdiv, Bulgaria

author

Atanas Dimitrov

• Department of General and Inorganic Chemistry, Plovdiv University, 4000, Plovdiv, Bulgaria

author

Georgi Patronov

• Department of Chemical Technology, Plovdiv University, 4000, Plovdiv, Bulgaria

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Identifiers

DOI

10.2478/s11532-006-0053-x