A Potentiometric Multisensor System of Anion-Selective Electrodes Based on Ionic Liquids

Shvedene, N. V.; Rzhevskaia, A. V.; Aksenova, V. A.; Pletnev, I. V.

doi:10.3103/s0027131418010078

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…Novel ionic liquids were recently utilized for creating anion‐selective sensors for a number of organic anions . In a multisensor array formed from the IL‐based ISEs was successfully implemented to distinguish between various types of mineral water.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ionic Liquids Based on Amino Acid Anions for Use in Liquid‐junction Free Reference Electrodes

et al. 2019

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In this paper we report on the novel polymeric membranes for the liquid junction‐free reference electrodes. The membranes contain the ionic liquids (ILs) based on the amino acid anions, namely valine‐, leucine‐, lysine‐ and histidine‐anions, and 1‐butyl‐3‐methylimidazolium cation. Addition of the ILs, and especially of the valine‐based one, to the polymeric plasticized membranes allows significant stabilization of the electrode potential and makes it insensitive to the solution composition. A simple criterion based on the calculated lipophilicities of the cation and anion of the IL is proposed for a priori estimation of its applicability for potential stabilization. The addition of the IL as a microcomponent is found to be advantageous over plasticizing the membrane with the IL due to better potential stability, higher dissociation degree and mobility of the species. The resistance of the novel reference membranes can be tuned by addition of the lipophilic membrane electrolytes, e. g. ETH500. The applicability of the developed reference electrodes is verified in the potentiometric calibration of the indicator K+‐ and Ca2+‐selective electrodes. Implementation of the amino acid‐based ionic liquids with low environmental toxicity can make a significant contribution to the development of nature‐friendly potentiometry.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Ionic Liquids Based on Amino Acid Anions for Use in Liquid‐junction Free Reference Electrodes

et al. 2019

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“…For relatively short contact times a reduced level of interference is observed, seemingly in defiance of the ion‐exchange equilibrium. This is partly a reason why some manufacturers are known to offer different ion‐selective electrodes on the basis of essentially the same composition for the detection of different ions, simply by properly preconditioning them to the ion of interest . Naturally, prolonged contact with a solution containing the interfering ion will eventually quantitatively displace the original ion from the membrane and render the sensor unresponsive to the ion of interest.…”

Section: Introductionmentioning

confidence: 99%

Ion‐exchange Microemulsions for Eliminating Dilute Interferences in Potentiometric Determinations

et al. 2018

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We report here for the first time on the use of functional microemulsions in potentiometric assays to remove dilute interferences from solution when measuring high concentrations of analyte. The microemulsions are similarly formulated to the ion‐selective membrane used in the measurement and act as sacrificial material. They are here stabilized by the triblock copolymer pluronic F‐127 and contain the chloride salt of the tridodecylmethylammonium cation, which also serves as anion‐exchanger in the membrane electrode. Both membrane and microemulsion are preconditioned with chloride. If an anionic interference is present at moderate concentration, the rapid equilibration with the functionalized microemulsion results in a quantitative removal. The principle is explored with salicylate as common interference in the detection of chloride in physiological samples. The data agree well to an equilibrium ion‐exchange model for the microemulsion. Salicylate levels up to millimolar can be effectively removed. Unfortunately, quaternary ammonium salt from the microemulsion is found to contaminate the ion‐selective membrane phase. Indeed, a cation‐exchanging valinomycin membrane in contact with concentrated anion‐exchanging microemulsions shows a large potential increase. This indicates that the membrane changes from cation to anion permselectivity. This contamination of the membrane by the microemulsion phase must be overcome for a practical application of the approach.

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“…The same IL was introduced in the carbon paste together with graphene nanosheets for determination of losartan (Bagheri et al, 2015 ). Electronic tongue system consisted of low-selective potentiometric sensor with 1,3-dihexadecylimidazolium salts as ionophores was successfully applied for identification of mineral water samples and separate determination of iodide and chloride anions in such waters (Shvedene et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Solid Contact Potentiometric Sensors Based on a New Class of Ionic Liquids on Thiacalixarene Platform

et al. 2018

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New solid-contact potentiometric sensors have been developed for hydrogen phosphate recognition on the basis of ionic liquids containing tetrasubstituted derivatives of thiacalix[4]arene in cone and 1,3-alternate conformations with trimethyl- and triethylammonium fragments at the lower rim substituents. The recognition of selected anions including carbonate, hydrogen phosphate, perchlorate, oxalate, picrate, and EDTA was conducted using electrochemical impedance spectroscopy with ferricyanide redox probe. For the potentiometric sensor assembling, the ionic liquids were stabilized by multiwalled carbon nanotubes and carbon black deposited on the glassy carbon electrode. The influence of support, steric factors and modification conditions on the sensor performance has been investigated. As was shown, potentiometric sensors developed make it possible to selectively determine hydrogen phosphate anion within the concentration range from 1 × 10−2 to 1 × 10−6 M and limit of detection of 2 × 10−7−1 × 10−6 M with unbiased selectivity coefficients varied from 1.2 × 10−1 to 1.0 × 10−8 (carbonate, acetate, oxalate, succinate, glutharate, glycolate, and malonate anions).

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A Potentiometric Multisensor System of Anion-Selective Electrodes Based on Ionic Liquids

Cited by 5 publications

References 15 publications

Evaluation of Ionic Liquids Based on Amino Acid Anions for Use in Liquid‐junction Free Reference Electrodes

Evaluation of Ionic Liquids Based on Amino Acid Anions for Use in Liquid‐junction Free Reference Electrodes

Ion‐exchange Microemulsions for Eliminating Dilute Interferences in Potentiometric Determinations

Solid Contact Potentiometric Sensors Based on a New Class of Ionic Liquids on Thiacalixarene Platform

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