Radiochemical and spectrophotometric investigations on the extraction equilibrium of ternary ion association thiocyanate complexes of cobalt(II) with nitrobluetetrazolium chloride (NBT) and triphenyltetrazolium chloride (TTC)

1986 ◽  
Vol 97 (2) ◽  
pp. 271-277 ◽  
Author(s):  
A. Alexandrov ◽  
M. Kamburova
Keyword(s):  
Ion Association ◽  
Triphenyltetrazolium Chloride ◽  
Extraction Equilibrium ◽  
Thiocyanate Complexes

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

2005 ◽  
Vol 3 (4) ◽  
pp. 747-755 ◽  
Author(s):  
Atanas Dimitrov ◽  
Vania Lekova ◽  
Kiril Gavazov ◽  
Boyan Boyanov
Keyword(s):  
Organic Solvent ◽  
Aqueous Medium ◽  
Spectrophotometric Method ◽  
Ion Association ◽  
Extraction Process ◽  
Association Constants ◽  
Optimum Conditions ◽  
Extraction Equilibrium ◽  
Simple Extraction

AbstractThe 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.

Studies on ion association: thermodynamics of thiocyanate complexes of some bivalent metal ions

1971 ◽  
Vol 2 (5) ◽  
pp. 435-442 ◽  
Author(s):  
R.C. Das ◽  
A.C. Dash ◽  
D. Satyanarayan ◽  
U.N. Dash
Keyword(s):  
Metal Ions ◽  
Ion Association ◽  
Bivalent Metal ◽  
Thiocyanate Complexes ◽  
Bivalent Metal Ions

scholarly journals Extraction-spectrophotometric investigations on two ternary ion-association complexes of gallium(III)

2012 ◽  
Vol 10 (4) ◽  
pp. 1262-1270 ◽  
Author(s):  
Kirila Stojnova ◽  
Kiril Gavazov ◽  
Galya Toncheva ◽  
Vanya Lekova ◽  
Atanas Dimitrov
Keyword(s):  
Complex Formation ◽  
Ion Association ◽  
Chloroform Extract ◽  
Liquid Extraction ◽  
Optimum Conditions ◽  
Triphenyltetrazolium Chloride ◽  
Liquid Liquid Extraction ◽  
Ion Associate ◽  
Optimum Extraction ◽  
Principal Species

AbstractComplex formation and liquid-liquid extraction were studied in systems containing Ga(III), azoderivative of resorcinol {4-(2-pyridylazo)resorcinol (PAR) or 4-(2-thiazolylazo)resorcinol (TAR)}, 2,3,5-triphenyltetrazolium chloride (TTC), water and chloroform. The optimum conditions w.r.t. pH, extraction time, concentration of ADR and concentration of TTC for the extraction of Ga(III) as an ion-associate complex were found.. The composition of the extracted complexes, (TT+)[Ga(PAR)2] (I), (TT+)[Ga(TAR)2] (II) or (TT+)2[Ga(OH)(TAR)2] (III), and the constants of association (β) between 2,3,5-triphenyltetrazolium cation (TT+) with corresponding anionic chelates were established by several methods. The constants of distribution (KD) and extraction (Kex) of the principal species I and III were determined as well. The apparent molar absorptivities of the chloroform extract at the optimum extraction-spectrophotometric conditions were ɛ′510=9.5×104 L mol−1 cm−1 (I) and ɛ′530=4.6×104 L mol−1 cm−1 (III). The validity of Beer’s law was checked and analytical characteristics that were calculated are reported herein.

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