scholarly journals Extraction-Chromogenic Systems Containing Iron(III), 4-(2-Thiazolylazo)resorcinol and Ditetrazolium Salts

2015 ◽  
Vol 31 (2) ◽  
pp. 981-986 ◽  
Author(s):  
Kiril Gavazov ◽  
Galya Toncheva ◽  
Teodora Stefanova ◽  
Kiril Simitchiev
Keyword(s):  
Ditetrazolium Salts

scholarly journals Liquid-liquid extraction of ion-association complexes of cobalt(II)-4-(2-pyridylazo)resorcinol with ditetrazolium salts

2015 ◽  
Vol 80 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Vidka Divarova ◽  
Kirila Stojnova ◽  
Petya Racheva ◽  
Vanya Lekova ◽  
Atanas Dimitrov
Keyword(s):  
Equilibrium Constants ◽  
Ion Association ◽  
Liquid Extraction ◽  
Tetrazolium Chloride ◽  
Molar Ratios ◽  
Liquid Liquid Extraction ◽  
Blue Tetrazolium ◽  
Blue Tetrazolium Chloride ◽  
Extraction Equilibria ◽  
Ditetrazolium Salts

The formation and liquid-liquid extraction of ion-association complexes between Co(II)-4-(2-Pyridylazo)resorcinol (PAR) anionic chelates and cations of three ditetrazolium chlorides were studied: Blue Tetrazolium chloride (BTC), Neotetrazolium chloride (NTC) and Nitro Blue Tetrazolium chloride (NBT). The optimum conditions for the formation and solvent extraction of the ion-association comlpex chelates were determined. It has been found that in the systems of Co(II)-PAR-DTS, the reactants are reacted in molar ratios 1:2:1 and the general formula of complexes was suggested. The extraction equilibria were investigated and quantitatively characterized by the equilibrium constants and the recovery factors. The analytical characteristics of the complexes were calculated.

Use of some mono- and ditetrazolium salts as spectrophotometric reagents for determination of ?Gardona?

1977 ◽  
Vol 67 (3-4) ◽  
pp. 219-227 ◽  
Author(s):  
P. S. Vassileva-Alexandrova ◽  
P. S. Shishmanov
Keyword(s):  
Ditetrazolium Salts
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