Graphic Data Analysis and Complex Formation Curves as Modelling and Optimization Tools in Potentiometric and Voltammetric Speciation Studies of a Pb(TAPSO)  x  (OH)  y   System | Zendy

Machado Carina M. M. | Zendy; Cukrowski Ignacy | Zendy; Soares Helena M. V. M. | Zendy

Premium

Graphic Data Analysis and Complex Formation Curves as Modelling and Optimization Tools in Potentiometric and Voltammetric Speciation Studies of a Pb(TAPSO) x (OH) y System

Author(s) -

Machado Carina M. M.,

Cukrowski Ignacy,

Soares Helena M. V. M.

Publication year - 2005

Publication title -

electroanalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.574

H-Index - 128

eISSN - 1521-4109

pISSN - 1040-0397

DOI - 10.1002/elan.200403244

Subject(s) - polarography , potentiometric titration , stability constants of complexes , chemistry , ionic strength , electroanalytical method , glass electrode , genetic algorithm , ionic bonding , metal , analytical chemistry (journal) , electrode , electrochemistry , chromatography , ion , reference electrode , organic chemistry , evolutionary biology , aqueous solution , biology

The formation of complex species between lead and TAPSO, a commercialized biological buffer, was evidenced and discussed. Formation constants of Pb(TAPSO) x (OH) y system have been studied by direct current polarography and by glass electrode potentiometry at fixed total–ligand and total–metal concentration ratio and varied pH, at 25.0 °C and ionic strength set to 0.1 M KNO 3 . The graphic analysis revealed to be a very powerful tool in the prediction and refinement operations of Pb–(TAPSO) x (OH) y system. The proposed final model for this system is: PbL, PbL 2 , PbL 2 (OH) and PbL 2 (OH) 2 , with stability constants values, as log β , of 3.7±0.1, 6.6±0.1, 12.9±0.1 and 17.8±0.1, respectively.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research