Hybrid Materials Based on MF-4SC Membranes and Carbon Nanotubes: Transport Properties and Characteristics of DP-sensors in Hydrophobic Amino Acid Solutions

被引：5
|
作者：
Parshina, A., V [1 ]
Titova, T. S. [1 ]
Evdokimova, D. D. [1 ]
Bobreshova, O., V [1 ]
Safronova, E. Yu [2 ]
Prikhno, I. A. [2 ]
Yaroslavtsev, A. B. [2 ]
机构：
[1] Voronezh State Univ, Voronezh 394018, Russia
[2] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
来源：
MEMBRANES AND MEMBRANE TECHNOLOGIES | 2019年 / 1卷 / 04期
关键词：
potentiometric sensors; perfluorinated sulfonated cation-exchange membranes; carbon nanotubes; hybrid materials; ion transfer; Donnan potential; amino acids; FUEL-CELL; POTENTIOMETRIC SENSORS; PROTON; NAFION; NANOMATERIALS; PERFORMANCE;
D O I：
10.1134/S2517751619040073
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Perfluorinated sulfonated cation-exchange membranes MF-4SC containing 0.5-3.0% of carbon nanotubes (CNTs) have been synthesized. A correlation between the water uptake and transport properties of the membranes in the K+-form and the sensitivity of DP-sensors (with the analytical signal in the form of a Donnan potential) to the analyte and interfering ions in solutions of hydrophobic amino acids (alanine, valine, and phenylalanine) has been found. Hybrid membrane samples that provide the highest sensitivity of DP-sensors to amino acid cations and zwitterions and the lowest sensitivity to hydroxonium ions at pH < 7 in a concentration range of 1.0 x 10(-4)-1.0 x 10(-1) M have been selected. Membrane modification has led to a decrease in the relative error and the relative standard deviation in the determination of amino acid ions by a factor of 3 and 1.5, respectively.
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收藏
页码：220 / 228
页数：9
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