Nitrate‐Selective Solid Contact Electrodes with Poly(3‐octylthiophene) and Poly(aniline) as Ion‐to‐Electron Transducers Buffered with Electron‐Ion‐Exchanging Resin

Khripoun, Galina A.; Volkova, Elina A.; Liseenkov, Artiom V.; Mikhelson, Konstantin N.

doi:10.1002/elan.200603532

Cited by 34 publications

(22 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The slopes within the linear range were −53.7 ± 0.4 mV/

. These slightly sub-Nernstian slopes are common for NO 3 − -ISEs based on quaternary ammonium salts [ 4 , 25 ]. The selectivity of NO 3 − over Cl − (separate solutions method) showed that log K NO3/Cl ≈ −1.8.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Properties of Nitrate-Selective Electrodes: The Dependence of Resistance on the Solution Concentration

Ivanova

Mikhelson

2018

Sensors

View full text Add to dashboard Cite

The electrochemical properties of ion-exchanger-based solvent polymeric ion-selective electrodes (ISEs)—bulk and interfacial resistance, capacitance, and polarization under a galvanostatic current step—are studied, with a nitrate ISE based on tetradecylammonium nitrate (TDANO3) as a model system. The study is performed by chronopotentiometric and impedance measurements, and focuses on the dependence of the aforementioned properties on the concentration of NO3− anions in solution. The impacts from the bulk and the interfacial charge transfer to the overall membrane resistance are revealed. It is shown that the bulk resistance of the membranes decreases over an increase of NO3− concentration within the range of a Nernstian potentiometric response of the ISE. This fact, also reported earlier for K+- and Ca2+-selective ISEs, is not in line with current views of the mechanism of the ISE response, or of the role of ion exchange in particular. The origin of this effect is unclear. Estimates are made for the concentration of ionized species (NO3− and TDA+) and, respectively, for the TDANO3 association constant, as well as for the species diffusion coefficients in the membrane.

show abstract

“…The slopes within the linear range were −53.7 ± 0.4 mV/

Section: Resultsmentioning

confidence: 99%

Electrochemical Properties of Nitrate-Selective Electrodes: The Dependence of Resistance on the Solution Concentration

Ivanova

Mikhelson

2018

Sensors

View full text Add to dashboard Cite

show abstract

“…As it was already previously demonstrated , an inadequate choice of transducing material has more drastic effects with anion sensors and is expressed by a poor long‐term stability. As shown in reference , nitrate ion‐selective electrodes with POT and PANI as ion to electron transducer exhibited a larger drift over time than conventional liquid inner filling solution electrodes. A similar behaviour was reported for chloride‐selective electrodes with a polypyrrole conducting film .…”

Section: Introductionmentioning

confidence: 99%

Thin Layer Membrane Systems as Rapid Development Tool for Potentiometric Solid Contact Ion‐selective Electrodes

2020

View full text Add to dashboard Cite

The use of thin membrane layer ion‐selective electrodes (of ∼200 nm thickness) as rapid diagnosis tool is proposed. While conventional solid contact systems (with a membrane of ∼250 μm thickness) may exhibit a satisfactory stability for regular laboratory use, a signal degradation can still be distinguished over a longer period of time but this requires tedious and time consuming tests. By diminishing the thickness of the membrane by a factor of 103 approximately, diffusion processes happen faster, and the lifetime is significantly reduced. This would ordinarily be a strong drawback but not if the aim is to detect a membrane deterioration in a shorter time frame. This characteristic makes thin membrane systems an ideal tool for rapid complications identification in the development process of conventional solid contact electrodes. The approach is demonstrated here in the development of an all new solid contact probe for anions. PEDOT−C14, a conducting polymer, was used for the first time in a solid contact electrode with an anion exchange membrane for the detection of nitrate. The thin layer configuration was used to optimise the polymerisation parameters as well as the membrane composition without having to run week‐long trials. A stable conventional solid contact electrode was in the end successfully developed and exhibited a lower detection limit of 10−5.5 M for nitrate with a stable Nernstian response for several days.

show abstract

“…1,[10][11][12][13][14][15] While dozens of reports have appeared in the literature for cation detection (potassium, proton, calcium, copper, lead, see reference 1,16 ), so far very few papers were dedicated to the detection of anions using all solid state potentiometric sensing devices. [17][18][19][20][21][22][23][24] As a model system chloride was repeatedly measured with films formed by POT doped with tridodecylmethlyammonium chloride (R + Cl -). 24 A Nernstian response was obtained as a function of chloride concentration, suggesting that the doped POT film functions as an electrode of the second kind.…”

Section: Introductionmentioning

confidence: 99%

All-Solid-State Potentiometric Sensors with a Multiwalled Carbon Nanotube Inner Transducing Layer for Anion Detection in Environmental Samples

et al. 2015

View full text Add to dashboard Cite

While ion to electron transducing layers for the fabrication of potentiometric membrane electrodes for the detection of cations have been well established, similar progress for the sensing of anions has not yet been realized. We report for this reason on a novel approach for the development of all-solid-state anion selective electrodes using lipophilic multiwalled carbon nanotubes (f-MWCNTs) as the inner ion to electron transducing layer. This material can be solvent cast, as it conveniently dissolves in tetrahydrofuran (THF), an important advantage to develop uniform films without the need for using surfactants that might deteriorate the performance of the electrode. Solid contact sensors for carbonate, nitrate, nitrite, and dihydrogen phosphate are fabricated and characterized, and all exhibit comparable analytical characteristics to the inner liquid electrodes. For example, the carbonate sensor exhibits a Nernstian slope of 27.2 ± 0.8 mV·dec(-1), a LOD = 2.3 μM, a response time of 1 s, a linear range of four logarithmic units, and a medium-term stability of 0.04 mV·h(-1) is obtained in a pH 8.6 buffered solution. Water layer test, reversibility, and selectivity for chloride, nitrate, and hydroxide are also reported. The excellent properties of f-MWCNTs as a transducer are contrasted to the deficient performance of poly(3-octyl-thiophene) (POT) for carbonate detection. This is evidenced both with a significant drift in the potentiometric measures as well as a pronounced sensitivity to light (either sunlight or artificial light). This latter aspect may compromise its potential for environmental in situ measurements (night/day cycles). The concentration of carbonate is determined in a river sample (Arve river, Geneva) and compared to a reference method (automatic titrator with potentiometric pH detection). The results suggest that nanostructured materials such as f-MWCNTs are an attractive platform as a general ion-to-electron transducer for anion-selective electrodes.

show abstract

Nitrate‐Selective Solid Contact Electrodes with Poly(3‐octylthiophene) and Poly(aniline) as Ion‐to‐Electron Transducers Buffered with Electron‐Ion‐Exchanging Resin

Cited by 34 publications

References 24 publications

Electrochemical Properties of Nitrate-Selective Electrodes: The Dependence of Resistance on the Solution Concentration

Electrochemical Properties of Nitrate-Selective Electrodes: The Dependence of Resistance on the Solution Concentration

Thin Layer Membrane Systems as Rapid Development Tool for Potentiometric Solid Contact Ion‐selective Electrodes

All-Solid-State Potentiometric Sensors with a Multiwalled Carbon Nanotube Inner Transducing Layer for Anion Detection in Environmental Samples

Contact Info

Product

Resources

About