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Determination of the ionic composition of perfluorinated sulfocationite membranes based on Donnan potential estimates

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Abstract

An express method for determination of the membrane ionic composition is developed based on the possibility of estimating the Donnan potential difference on the individual studied-solution/membrane interface. The Donnan potential is assessed using a new device one end of which serves as the ion-selective electrode sensor. The ionic composition of perfluorinated sulfocationite membranes is determined in systems with mixed inorganic electrolyte solutions by comparing the Donnan potentials in a given system and the reference system. As the reference, a system with perfluorinated sulfocationic membrane and individual potassium chloride solutions is used. The time of one measurement does not exceed 10–15 min. The accuracy and sensitivity of determination were 3% and 0.02 mmol/g, respectively.

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Authors and Affiliations

  1. Voronezh State University, Voronezh, Russia

    O. V. Bobreshova, A. V. Parshina & E. A. Ryzhkova

Authors
  1. O. V. Bobreshova
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  2. A. V. Parshina
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  3. E. A. Ryzhkova
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Correspondence to O. V. Bobreshova.

Additional information

Original Russian Text © O.V. Bobreshova, A.V. Parshina, E.A. Ryzhkova, 2009, published in Elektrokhimiya, 2009, Vol. 45, No. 11, pp. 1333–1339.

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Bobreshova, O.V., Parshina, A.V. & Ryzhkova, E.A. Determination of the ionic composition of perfluorinated sulfocationite membranes based on Donnan potential estimates. Russ J Electrochem 45, 1234–1239 (2009). https://doi.org/10.1134/S1023193509110032

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  • DOI: https://doi.org/10.1134/S1023193509110032

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