Error simulation in the determination of the formation constants of polymer-metal complexes (pmc) by the liquid-phase polymer-based retention (lpr) technique

• BENRABÉ L RIVAS ^[1] ; L. NICOLÁS SCHIAPPACASSE ^[1] ; EDUARDO PEREIRAU ^[1] ; IGNACIO MORENO-VILLOSLADA ^[2]
  1. [1] Universidad de Concepción

     Universidad de Concepción

     Comuna de Concepción, Chile

     
  2. [2] Universidad Austral de Chile

     Universidad Austral de Chile

     Valdivia, Chile

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 49, Nº. 4, 2004, págs. 345-350
• Idioma: inglés
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• Resumen

  • The Liquid-phase polymer-based retention (LPR) technique allows calculating the formation constant of polymer-metal ion complexes (Kf). The dependence of the relative error in Kf (eK) on the error in the total retention coefficient a (e a) has been searched and it was found that its influence is higher as a increases, so that its measurement must be performed with higher precision. In addition, e a is higher for high a values due to the stronger influence of errors in the measurements of the different magnitudes that allow its calculation. In order to achieve a measurement of Kf with a relative error lower than 7 %, the experimental a found should not exceed the value 0.4 when relative errors for the independent variables ranging between 2 % and 5 % are considered