Influence of hydrophobization of the polyazulene ion-to-electron transducer on the potential stability of calcium-selective solid-contact electrodes

2015 ◽  
Vol 207 ◽  
pp. 918-925 ◽  
Author(s):  
Ning He ◽  
Lajos Höfler ◽  
Rose-Marie Latonen ◽  
Tom Lindfors
Keyword(s):  
Solid Contact ◽  
Contact Electrodes ◽  
Potential Stability

scholarly journals Ion-to-electron capacitance of single-walled carbon nanotube layers before and after ion-selective membrane deposition

2021 ◽  
Vol 188 (5) ◽  
Author(s):  
Elena Zdrachek ◽  
Eric Bakker
Keyword(s):  
Carbon Nanotube ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Essential Step ◽  
Before And After ◽  
Selective Membrane ◽  
High Potential Stability ◽  
Potential Stability

AbstractThe capacitance of the ion-to-electron transducer layer helps to maintain a high potential stability of solid-contact ion-selective electrodes (SC-ISEs), and its estimation is therefore an essential step of SC-ISE characterization. The established chronopotentiometric protocol used to evaluate the capacitance of the single-walled carbon nanotube transducer layer was revised in order to obtain more reliable and better reproducible values and also to allow capacitance to be measured before membrane deposition for electrode manufacturing quality control purposes. The capacitance values measured with the revised method increased linearly with the number of deposited carbon nanotube–based transducer layers and were also found to correlate linearly before and after ion-selective membrane deposition, with correlation slopes close to 1 for nitrate-selective electrodes, to 0.7 and to 0.5 for potassium- and calcium-selective electrodes. Graphical abstract

scholarly journals Solid-Contact Ion-Selective Electrodes: Response Mechanisms, Transducer Materials and Wearable Sensors

Membranes ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 128 ◽  
Author(s):  
Yan Lyu ◽  
Shiyu Gan ◽  
Yu Bao ◽  
Lijie Zhong ◽  
Jianan Xu ◽  
...  
Keyword(s):  
Biological Fluids ◽  
Wearable Sensors ◽  
Ion Selective Electrodes ◽  
Double Layer Capacitance ◽  
Solid Contact ◽  
General Picture ◽  
Non Invasive ◽  
Potential Stability ◽  
Electric Double Layer Capacitance ◽  
Redox Capacitance

Wearable sensors based on solid-contact ion-selective electrodes (SC-ISEs) are currently attracting intensive attention in monitoring human health conditions through real-time and non-invasive analysis of ions in biological fluids. SC-ISEs have gone through a revolution with improvements in potential stability and reproducibility. The introduction of new transducing materials, the understanding of theoretical potentiometric responses, and wearable applications greatly facilitate SC-ISEs. We review recent advances in SC-ISEs including the response mechanism (redox capacitance and electric-double-layer capacitance mechanisms) and crucial solid transducer materials (conducting polymers, carbon and other nanomaterials) and applications in wearable sensors. At the end of the review we illustrate the existing challenges and prospects for future SC-ISEs. We expect this review to provide readers with a general picture of SC-ISEs and appeal to further establishing protocols for evaluating SC-ISEs and accelerating commercial wearable sensors for clinical diagnosis and family practice.

scholarly journals Comparison of Different Commercial Conducting Materials as Ion-to-Electron Transducer Layers in Low-Cost Selective Solid-Contact Electrodes

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1348
Author(s):  
C. Ocaña ◽  
M. Muñoz-Correas ◽  
N. Abramova ◽  
A. Bratov
Keyword(s):  
Good Accuracy ◽  
Low Cost ◽  
Pollution Monitoring ◽  
Ion Selective Electrodes ◽  
Comparison Study ◽  
Food Control ◽  
Solid Contact ◽  
Conducting Materials ◽  
Commercial Applications ◽  
Contact Electrodes

Simple, robust, sensitive and low-cost all-solid-state ion-selective electrodes (SCISEs) are of interest in different fields, such as medicine, veterinary, water treatment, food control, environmental and pollution monitoring, security, etc. as a replacement for traditional ion-selective electrodes with liquid inner contact. In spite of their potential advantages, SCISEs remain mainly in the research laboratories. With the motivation of developing simple and low-cost SCISEs with possible commercial applications, we report a comparison study of six different commercial conducting materials, namely, polypyrrole-block-polycaprolactone (PPy-b-PCaprol), graphene/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) ink, poly(3,4-ethylenedioxythiophene):polyethylenglycol (PEDOT:PEG), high conductivity PEDOT:PSS, polyethylenimine (PEI) with PEDOT:PSS for their possible use as ion-to-electron transducer in polyurethane based pH-SCISEs. Among all studied pH-SCISES, PEDOT:PEG based electrodes exhibited the best results in terms of sensitivity, reproducibility and lifetime. Finally, these sensors were tested in different real samples showing good accuracy.

scholarly journals Ruthenium dioxide nanoparticles as a high-capacity transducer in solid-contact polymer membrane-based pH-selective electrodes

2019 ◽  
Vol 186 (12) ◽  
Author(s):  
Nikola Lenar ◽  
Beata Paczosa-Bator ◽  
Robert Piech
Keyword(s):  
High Capacity ◽  
Glass Electrode ◽  
Ruthenium Dioxide ◽  
Solid Contact ◽  
New Approach ◽  
Potentiometric Response ◽  
Small Resistance ◽  
Nernstian Slope ◽  
Capacity Transducer ◽  
Contact Electrodes

AbstractA new approach is presented for the design of ion selective electrodes. Ruthenium dioxide nanoparticles were incorporated into solid-contact electrodes, and their properties were studied for the case of pH-selective electrodes. The use of the RuO2 is shown to significantly improve the potentiometric response, while no redox response is observed. The use of RuO2 results in a Nernstian slope (59 mV/decade) towards hydrogen ions over a wide linear range (pH 2 to 12). The results obtained by chronopotentiometry reveal small resistance, and the capacitance is as high as 1.12 mF. This results in a good stability of the response and in a low potential drift (0.89 μV∙s−1). The electrodes exhibit properties nearly as excellent as those of a glass electrode, but they are much smaller, less fragile, and easy to use.

Study on Hydrogen Ion-Selective Solid Contact Electrodes Based on Decamethylcyclopentasiloxane

2011 ◽  
Vol 44 (12) ◽  
pp. 2138-2149 ◽  
Author(s):  
Boram Kim ◽  
Jihye Shim ◽  
Koo-Chun Chung
Keyword(s):  
Hydrogen Ion ◽  
Solid Contact ◽  
Contact Electrodes

Potentiometric sensing utilizing paper-based microfluidic sampling

The Analyst ◽  
2014 ◽  
Vol 139 (9) ◽  
pp. 2133-2136 ◽  
Author(s):  
Jingwen Cui ◽  
Grzegorz Lisak ◽  
Sylwia Strzalkowska ◽  
Johan Bobacka
Keyword(s):  
Solid Contact ◽  
New Approach ◽  
Contact Electrodes

This communication presents a new approach to potentiometric sensing utilizing paper-based microfluidic sampling and solid-contact electrodes.

Determination of Microcystin-LR in waters in the subnanomolar range by sol–gel imprinted polymers on solid contact electrodes

The Analyst ◽  
2012 ◽  
Vol 137 (10) ◽  
pp. 2437 ◽  
Author(s):  
Raquel B. Queirós ◽  
João P. Noronha ◽  
Paulo V. S. Marques ◽  
João S. Fernandes ◽  
M. Goreti F. Sales
Keyword(s):  
Sol Gel ◽  
Solid Contact ◽  
Imprinted Polymers ◽  
Contact Electrodes

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

2006 ◽  
Vol 18 (13-14) ◽  
pp. 1322-1328 ◽  
Author(s):  
Galina A. Khripoun ◽  
Elina A. Volkova ◽  
Artiom V. Liseenkov ◽  
Konstantin N. Mikhelson
Keyword(s):  
Solid Contact ◽  
Contact Electrodes ◽  
Poly Aniline

scholarly journals Single-Walled Carbon Nanotubes (SWCNTs) as Solid-Contact in All-Solid-State Perchlorate ISEs: Applications to Fireworks and Propellants Analysis

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2697 ◽  
Author(s):  
Saad S. M. Hassan ◽  
Ahmed Galal Eldin ◽  
Abd El-Galil E. Amr ◽  
Mohamed A. Al-Omar ◽  
Ayman H. Kamel
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Impedance ◽  
Cost Effective ◽  
Single Walled Carbon Nanotubes ◽  
Solid Contact ◽  
Single Walled Carbon ◽  
Tetraphenyl Porphyrin ◽  
Eis Measurements ◽  
Walled Carbon Nanotubes ◽  
Potential Stability

Herein, we present reliable, robust, stable, and cost-effective solid-contact ion-selective electrodes (ISEs) for perchlorate determination. Single-walled carbon nanotubes (SWCNTs) were used as solid-contact material and indium (III) 5, 10, 15, 20-(tetraphenyl) porphyrin chloride (InIII-porph) as an ion carrier. The sensor exhibited an improved sensitivity towards ClO4− ions with anionic slope of −56.0 ± 1.1 (R2 = 0.9998) mV/decade over a linear range 1.07 × 10−6 – 1.0 × 10−2 M and detection limit of 1.8 × 10−7 M. The short-term potential stability and the double-layer capacitance were measured by chronopotentiometric and electrochemical impedance spectroscopy (EIS) measurements, respectively. The sensor is used for ClO4− determination in fireworks and propellant powders. The results fairly agree with data obtained by ion chromatography.

scholarly journals Single-Piece Solid Contact Cu2+-Selective Electrodes Based on a Synthesized Macrocyclic Calix[4]arene Derivative as a Neutral Carrier Ionophore

Molecules ◽  
2019 ◽  
Vol 24 (5) ◽  
pp. 920 ◽  
Author(s):  
Abd E. Amr ◽  
Mohamed Al-Omar ◽  
Ayman H. Kamel ◽  
Elsayed A. Elsayed
Keyword(s):  
Tap Water ◽  
Nanocomposite Membrane ◽  
Potentiometric Sensors ◽  
Solid Contact ◽  
Response Slope ◽  
Single Piece ◽  
Walled Carbon Nanotubes ◽  
Potential Stability

Herein, a facile route leading to good single-walled carbon nanotubes (SWCNT) dispersion or poly (3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) based single-piece nanocomposite membrane is proposed for trace determination of Cu2+ ions. The single-piece solid contact Cu2+-selective electrodes were prepared after drop casting the membrane mixture on the glassy-carbon substrates. The prepared potentiometric sensors revealed a Nernstian response slope of 27.8 ± 0.3 and 28.1 ± 0.4 mV/decade over the linearity range 1.0 × 10−3 to 2.0 × 10−9 and 1.0 × 10−3 to 1.0 × 10−9 M with detection limits of 5.4 × 10−10 and 5.0 × 10−10 M for sensors based on SWCNTs and PEDOT/PSS, respectively. Excellent long-term potential stability and high hydrophobicity of the nanocomposite membrane are recorded for the prepared sensors due to the inherent high capacitance of SWCNT used as a solid contact material. The sensors exhibited high selectivity for Cu2+ ions at pH 4.5 over other common ions. The sensors were applied for Cu2+ assessment in tap water and different tea samples. The proposed sensors were robust, reliable and considered as appealing sensors for copper (II) detection in different complex matrices.

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