TTF-TCNQ Solid Contact Layer in All-Solid-State Ion-Selective Electrodes for Potassium or Nitrate Determination

2018 ◽  
Vol 165 (2) ◽  
pp. B60-B65 ◽  
Author(s):  
Magdalena Pięk ◽  
Robert Piech ◽  
Beata Paczosa-Bator
Keyword(s):  
Solid State ◽  
Contact Layer ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Nitrate Determination

All-solid-state ion-selective electrodes with redox-active lithium, sodium, and potassium insertion materials as the inner solid-contact layer

The Analyst ◽  
2017 ◽  
Vol 142 (20) ◽  
pp. 3857-3866 ◽  
Author(s):  
Shinichi Komaba ◽  
Tatsuya Akatsuka ◽  
Kohei Ohura ◽  
Chihiro Suzuki ◽  
Naoaki Yabuuchi ◽  
...  
Keyword(s):  
Solid State ◽  
Contact Layer ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Ion Sensor ◽  
Sensor Performance ◽  
Redox Active ◽  
Sodium And Potassium

Ion sensor performance is highly improved by the installation of insertion materials applied in rechargeable Li, Na, and K batteries.

scholarly journals Robust fabrication of nanomaterial-based all-solid-state ion-selective electrodes

RSC Advances ◽  
2019 ◽  
Vol 9 (29) ◽  
pp. 16713-16717 ◽  
Author(s):  
Kaikai Liu ◽  
Xiaojing Jiang ◽  
Yuehai Song ◽  
Rongning Liang
Keyword(s):  
Solid State ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
First Time

For the first time, a general and facile approach for the robust fabrication of nanomaterial-based solid contact ISEs is reported.

Recent Progress in Disposable Ion-Selective Sensors for Environmental Applications

2012 ◽  
Vol 77 ◽  
pp. 65-70 ◽  
Author(s):  
Giusy Matzeu ◽  
Claudio Zuliani ◽  
Dermot Diamond
Keyword(s):  
Film Thickness ◽  
Recent Progress ◽  
Low Cost ◽  
Contact Layer ◽  
Ion Selective Electrodes ◽  
Complex Relationship ◽  
Solid Contact ◽  
Materials Used ◽  
Deposition Techniques

Solid-contact Ion Selective Electrodes (SC-ISEs) for the detection of lead are prepared on screen printed substrates in order to have low-cost and disposable sensors which may be useful in long-term environmental monitoring. It is shown that the materials used as solid contact layer, the deposition techniques and their thickness affect greatly the performances of the sensors. Poly(3-octylthiophene-2,5-diyl) (POT) and poly-3,4-ethylenedioxithiophene (PEDOT) are employed in this investigation. A trend showing an optimum is found for sensors prepared with POT as the batch reproducibility depends on the amount drop-cast, i.e., thickness. In case of PEDOT which is grown amperometrically the trend is more complex but an optimum for the batch reproducibility is again found depending on the current density. In the latter case, the film thickness and the overoxidation degree of the polymer probably concur in determining a more complex relationship.

scholarly journals All-Solid-State Ion-Selective Electrodes Based on Graphite Paste for Determination of Calcium(II) and Nitrate

2019 ◽  
Vol 11 (2) ◽  
pp. 156
Author(s):  
Johannes Schwarz ◽  
Ute Enseleit ◽  
Kathrin Trommer ◽  
Michael Mertig
Keyword(s):  
Solid State ◽  
Reference Method ◽  
Well Water ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Diglycolic Acid ◽  
Nitrate N ◽  
Selective Membrane ◽  
Pvc Membranes

Robust and easy-to-handle ion-selective electrodes in all-solid-state configurations based on graphite paste have been developed for applications in environmental samples. The electrode consists of different functional layers (graphite paste, conducting polymer, ion-selective membrane). The ion-selective compounds have been incorporated in polyvinylchloride (PVC) membranes. Polypyrrole (PPy) acts as a solid contact and an intermediate layer between the ion-selective membrane and the graphite paste. As ion-complexing compounds tridodecylmethylammonium nitrate (TDMA-NO3) for nitrate, N,N,N’,N’-tetra[cyclohexyl]diglycolic acid diamide and N,N-dicyclohexyl-N‘,N‘-dioctadecyl-diglycolic diamide for calcium(II) determinations have been used. The electrodes have been tested in drinking and well water samples by direct potentiometric determination and by titrations. The results have been compared to ion chromatography as the reference method. Both ion selective electrodes exhibit linear response from 10-5 mol/L to 10-1 mol/L respectively. The detection limits for the target ions are below 10-6 mol/L based on the respective ion.

scholarly journals Application of polyaniline nanofibers for the construction of nitrate all-solid-state ion-selective electrodes

2021 ◽  
Author(s):  
Karolina Pietrzak ◽  
Cecylia Wardak ◽  
Szymon Malinowski
Keyword(s):  
Electrochemical Impedance ◽  
Fast Response ◽  
Point Of View ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Measuring Range ◽  
Polyaniline Nanofibers ◽  
Vis Spectroscopy ◽  
Selective Membrane ◽  
Nitrate Determination

AbstractThe application of polyaniline nanofibers doped with chloride and nitrate ions (PANINFs-Cl and PANINFs-NO3) in potentiometry was described. Both kinds of nanofibers were used as an ion-to-electron transducer in ion-selective electrodes with solid contact (SCISEs). Extensive research on the properties of the nanofibers themselves (SEM, UV–Vis spectroscopy, FTIR) and the constructed electrodes (potentiometric methods, electrochemical impedance spectroscopy) has been carried out. Basic analytical parameters of electrodes containing various nanofibers contents in the ion-selective membrane and with nanofibers as an intermediate layer were determined. It was found that application of PANI nanofibers resulted in improvement of electrode performance (among others, better stability and reversibility of the electrode potential). The obtained sensors were characterized by a high slope of the calibration curve, a wide measuring range and a fast response time. Moreover, they were insensitive to change of redox potential, as well as light and the presence of oxygen in the solution, what is important from a practical point of view. They were also successfully used for nitrate determination in real environmental samples.

Water uptake in the hydrophilic poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) solid-contact of all-solid-state polymeric ion-selective electrodes

The Analyst ◽  
2011 ◽  
Vol 136 (16) ◽  
pp. 3252 ◽  
Author(s):  
Jean-Pierre Veder ◽  
Roland De Marco ◽  
Graeme Clarke ◽  
San Ping Jiang ◽  
Kathryn Prince ◽  
...  
Keyword(s):  
Solid State ◽  
Water Uptake ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Styrene Sulfonate ◽  
Poly Styrene Sulfonate

scholarly journals Improved Solid-Contact Nitrate Ion Selective Electrodes Based on Multi-Walled Carbon Nanotubes (MWCNTs) as an Ion-to-Electron Transducer

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3891 ◽  
Author(s):  
Hassan ◽  
Eldin ◽  
Amr ◽  
Al-Omar ◽  
Kamel ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ion Association ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Nitrate Ion ◽  
Ion Sensing ◽  
Coated Disc ◽  
Multi Walled Carbon Nanotubes ◽  
Nitrate Determination ◽  
Walled Carbon Nanotubes

Possible improvement of the performance characteristics, reliability and selectivity of solid-contact nitrate ion-selective electrodes (ISE) (SC/NO3−-ISE) is attained by the application of a nitron-nitrate (Nit+/NO3−) ion association complex and inserting multi-walled carbon nanotubes (MWCNTs) as an ion-to-electron transducer between the ion sensing membrane (ISM) and the electronic conductor glassy carbon (GC) substrate. The potentiometric performance of the proposed electrode revealed a Nernstian slope −55.1 ± 2.1 (r² = 0.997) mV/decade in the range from 8.0 × 10−8–1 × 10−2 M with a detection limit of 2.8 × 10−8 (1.7 ng/mL). Selectivity, repeatability and reproducibility of the proposed sensors were considerably improved as compared to the coated disc electrode (GC/NO3−-ISE) without insertion of a MWCNT layer. Short-term potential stability and capacitance of the proposed sensors were tested using a current-reversal chronopotentiometric technique. The potential drift in presence of a MWCNT layer decreased from 167 μVs−1 (i.e., in absence of MWCNTs) to 16.6 μVs−1. In addition, the capacitance was enhanced from 5.99 μF (in absence of MWCNTs) to 60.3 μF (in the presence of MWCNTs). The presented electrodes were successfully applied for nitrate determination in real samples with good accuracy.

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