Determination of glycine, alanine, and leucine at different solution ph with the aid of donnan potential sensors based on hybrid membranes
- Authors: Parshina A.V.1, Titova T.S.1, Safronova E.Y.2, Bobreshova O.V.1, Yaroslavtsev A.B.2
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Affiliations:
- Voronezh State University
- Kurnakov Institute of General and Inorganic Chemistry
- Issue: Vol 71, No 3 (2016)
- Pages: 259-268
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/181546
- DOI: https://doi.org/10.1134/S1061934816030102
- ID: 181546
Cite item
Abstract
The cross sensitive sensors whose analytical signal is the Donnan potential (PD-sensors) were developed for the determination of the amino acids glycine, alanine, and leucine in acidic and alkaline solutions. Hybrid materials based on perfluorinated sulfo cation-exchange membranes Nafion and MF-4SC with incorporated zirconium dioxide and silicon dioxide nanoparticles, including those with modified surfaces containing proton-acceptor groups, were used in the PD-sensors. The sensitivity of the PD-sensors to hydronium ions, which interfere with the determination of amino acids at pH < 7, was considerably decreased due to the use of the membranes obtained by an in situ method that contained silicon dioxide nanoparticles with amine-containing groups. The greatest sensitivity of the PD-sensors to the anions of amino acids at pH > 7 and the smallest sensitivity to the cations K+ were observed in hybrid membranes, which combined an increased rate of anion transfer and a low moisture capacity. The use of the PD-sensors based on hybrid membranes makes it possible to determine the cations, anions, and zwitterions of amino acids over a wide range of pH with a sufficiently high accuracy.
About the authors
A. V. Parshina
Voronezh State University
Author for correspondence.
Email: parshina_ann@mail.ru
Russian Federation, Universitetskaya pl. 1, Voronezh, 394006
T. S. Titova
Voronezh State University
Email: parshina_ann@mail.ru
Russian Federation, Universitetskaya pl. 1, Voronezh, 394006
E. Yu. Safronova
Kurnakov Institute of General and Inorganic Chemistry
Email: parshina_ann@mail.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
O. V. Bobreshova
Voronezh State University
Email: parshina_ann@mail.ru
Russian Federation, Universitetskaya pl. 1, Voronezh, 394006
A. B. Yaroslavtsev
Kurnakov Institute of General and Inorganic Chemistry
Email: parshina_ann@mail.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991