scholarly journals Single strip solid contact ion selective electrodes on a pencil-drawn electrode substrate

2017 ◽  
Vol 9 (7) ◽  
pp. 1213-1220 ◽  
Author(s):  
T. Fayose ◽  
L. Mendecki ◽  
S. Ullah ◽  
A. Radu
Keyword(s):  
Low Cost ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Cost Approach ◽  
Single Strip

A simple and low-cost approach for the preparation of ion-selective electrodes (ISEs) is proposed as a favorable alternative to traditional paper-based electrodes.

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 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 Low-cost flexible laminated graphene paper solid-contact ion-selective electrodes

2021 ◽  
pp. 129808
Author(s):  
Marcelina Rutkowska ◽  
Tom Lindfors ◽  
Zhanna Boeva ◽  
Marcin Strawski
Keyword(s):  
Low Cost ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Graphene Paper

scholarly journals 3D-printed manifold integrating solid contact ion-selective electrodes for multiplexed ion concentration measurements in urine

Talanta ◽  
2021 ◽  
pp. 122491
Author(s):  
Marek Dębosz ◽  
József Kozma ◽  
Radosław Porada ◽  
Marcin Wieczorek ◽  
Justyna Paluch ◽  
...  
Keyword(s):  
Ion Concentration ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
3D Printed ◽  
Concentration Measurements

scholarly journals Potentiometric Carboxylate Sensors Based on Carbazole-Derived Acyclic and Macrocyclic Ionophores

Chemosensors ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 4
Author(s):  
Ville Yrjänä ◽  
Indrek Saar ◽  
Mihkel Ilisson ◽  
Sandip A. Kadam ◽  
Ivo Leito ◽  
...  
Keyword(s):  
Detection Limit ◽  
Vinyl Chloride ◽  
Anion Exchanger ◽  
Linear Range ◽  
Ph Sensitivity ◽  
Ion Selective Electrodes ◽  
Solid Contact ◽  
Response Characteristics ◽  
Potentiometric Response ◽  
Poly Vinyl Chloride

Solid-contact ion-selective electrodes with carbazole-derived ionophores were prepared. They were characterized as acetate sensors, but can be used to determine a number of carboxylates. The potentiometric response characteristics (slope, detection limit, selectivity, and pH sensitivity) of sensors prepared with different membrane compositions (ionophore, ionophore concentration, anion exchanger concentration, and plasticizer) were evaluated. The results show that for the macrocyclic ionophores, a larger cavity provided better selectivity. The sensors exhibited modest selectivity for acetate but good selectivity for benzoate. The carbazole-derived ionophores effectively decreased the interference from lipophilic anions, such as bromide, nitrate, iodide, and thiocyanate. The selectivity, detection limit, and linear range were improved by choosing a suitable plasticizer and by reducing the ionophore and anion exchanger concentrations. The influence of the electrode body’s material upon the composition of the plasticized poly(vinyl chloride) membrane, and thus also upon the sensor characteristics, was also studied. The choice of materials for the electrode body significantly affected the characteristics of the sensors.

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

A simplified low-cost approach to antibiotic resistance profiling for faecal source tracking

2004 ◽  
Vol 50 (1) ◽  
pp. 185-191 ◽  
Author(s):  
J.E. Ebdon ◽  
J.L. Wallis ◽  
H.D. Taylor
Keyword(s):  
Antibiotic Resistance ◽  
Binary Data ◽  
Human Error ◽  
Function Analysis ◽  
Average Rate ◽  
Low Cost ◽  
Source Tracking ◽  
Source Discrimination ◽  
Cost Approach ◽  
Faecal Bacteria

Antibiotic resistance profiling (ARP) is a potentially useful method for distinguishing faecal bacteria according to host source. This phenotypic approach has cost benefits over genotypic methods, but existing protocols are time-consuming and manual data handling is open to human error. A simplified, low-cost approach to the ARP technique was developed that used automated data recording techniques combined with simple statistical analyses to compare isolates of the genus Enterococcus from various faecal sources. An initial battery of 21 antibiotics (at up to four concentrations) was chosen for source discrimination. Images of growth or non-growth in microplate wells were stored as bitmaps and converted to binary data to form a database of known antibiotic resistance profiles. Discriminant function analysis (DFA) showed that the average rate of isolates correctly classified by the database (wastewater vs non-wastewater) was 86%. Once the more discriminating antibiotics and their concentrations had been identified, it was possible to reduce the number of tests from 80 to 18 whilst increasing the number of correctly classified human isolates. ARP could offer a low-cost and rapid means of identifying sources of faecal pollution. As such, the technique may be of particular benefit to developing countries, where water quality may have a significant impact on health and where cost is a major factor when choosing environmental management technology.

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