高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (S1): 93.

• Electroanalytical Chemistry • 上一篇    下一篇

Potentiometric Titration of Polyelectrolyte and Heterogeneous Systems

SVETLANA Yu. Bratskaya, ALEXEY P. Golikov   

  1. Institute of Chemistry, Far East Brunch of Russian Academy of Sciences, Vladivostok 690022, Russia
  • 出版日期:1999-12-31 发布日期:1999-12-31

Potentiometric Titration of Polyelectrolyte and Heterogeneous Systems

SVETLANA Yu. Bratskaya, ALEXEY P. Golikov   

  1. Institute of Chemistry, Far East Brunch of Russian Academy of Sciences, Vladivostok 690022, Russia
  • Online:1999-12-31 Published:1999-12-31

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被引次数

6

摘要：

A new method for processing acid-base potentiometric titration curves has been suggested. This method of density functions (MDF) uses integral description of acid-base equilibria in a system under study to calculate acidity constant spectra of polyelectrolytes, sorbents and any other polyfunctional objects. MDF can be considered as a method of pK-spectroscopy but it is more accurate and reliable than others, since the regularization method is used to solve the main integral equation of MDF. The main equation is derived from equations of material balance and electroneutrality and does not include any value that can not be measured at the potentiometric titration except the density function. When the main equation is solved we have all information about a system under study:number of components or functional group types; their acidity constants and concentrations in a chosen range of pK.

Abstract:

A new method for processing acid-base potentiometric titration curves has been suggested. This method of density functions (MDF) uses integral description of acid-base equilibria in a system under study to calculate acidity constant spectra of polyelectrolytes, sorbents and any other polyfunctional objects. MDF can be considered as a method of pK-spectroscopy but it is more accurate and reliable than others, since the regularization method is used to solve the main integral equation of MDF. The main equation is derived from equations of material balance and electroneutrality and does not include any value that can not be measured at the potentiometric titration except the density function. When the main equation is solved we have all information about a system under study:number of components or functional group types; their acidity constants and concentrations in a chosen range of pK.

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