scholarly journals Solid-Contact Potentiometric Anion Sensing Based on Classic Silver/Silver Insoluble Salts Electrodes without Ion-Selective Membrane

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 959
Author(s):  
Chunxian Liao ◽  
Lijie Zhong ◽  
Yitian Tang ◽  
Zhonghui Sun ◽  
Kanglong Lin ◽  
...  
Keyword(s):  
Polymeric Membrane ◽  
Solid Contact ◽  
Ion Sensors ◽  
Anion Sensing ◽  
Metal Metal ◽  
Selective Membrane ◽  
Organic Chloride ◽  
Silver Silver ◽  
Potentiometric Ion Sensors ◽  
Insoluble Salt

Current solid potentiometric ion sensors mostly rely on polymeric-membrane-based, solid-contact, ion-selective electrodes (SC-ISEs). However, anion sensing has been a challenge with respect to cations due to the rareness of anion ionophores. Classic metal/metal insoluble salt electrodes (such as Ag/AgCl) without an ion-selective membrane (ISM) offer an alternative. In this work, we first compared the two types of SC-ISEs of Cl− with/without the ISM. It is found that the ISM-free Ag/AgCl electrode discloses a comparable selectivity regarding organic chloride ionophores. Additionally, the electrode exhibits better comprehensive performances (stability, reproducibility, and anti-interference ability) than the ISM-based SC-ISE. In addition to Cl−, other Ag/AgX electrodes also work toward single and multi-valent anions sensing. Finally, a flexible Cl− sensor was fabricated for on-body monitoring the concentration of sweat Cl− to illustrate a proof-of-concept application in wearable anion sensors. This work re-emphasizes the ISM-free SC-ISEs for solid anion sensing.

Detection limit of polymeric membrane potentiometric ion sensors: how can we go down to trace levels?

1999 ◽  
Vol 397 (1-3) ◽  
pp. 103-111 ◽  
Author(s):  
Yanming Mi ◽  
Sally Mathison ◽  
Roderick Goines ◽  
Alicia Logue ◽  
Eric Bakker
Keyword(s):  
Detection Limit ◽  
Polymeric Membrane ◽  
Ion Sensors ◽  
Potentiometric Ion 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

Applications of potentiometric ion sensors in the characterization of nonaqueous solvents

1990 ◽  
Vol 90 (5) ◽  
pp. 827-835 ◽  
Author(s):  
J. F. Coetzee ◽  
B. K. Deshmukh ◽  
C. C. Liao
Keyword(s):  
Nonaqueous Solvents ◽  
Ion Sensors ◽  
Potentiometric Ion Sensors

scholarly journals Wearable potentiometric ion sensors

2019 ◽  
Vol 110 ◽  
pp. 303-320 ◽  
Author(s):  
Marc Parrilla ◽  
Maria Cuartero ◽  
Gaston A. Crespo
Keyword(s):  
Ion Sensors ◽  
Potentiometric Ion Sensors
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