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Flow injection amperometry as an alternative to potentiometry for solid contact ion-selective membrane-based electrodes
- Source :
- Electrochimica Acta. 377:138074
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In this work we propose a flow injection amperometry at constant potential as a perspective alternative to classical potentiometry for solid contact ion-selective electrodes (SC-ISEs). The amperometric readout mode eliminates the problem of background drift and potential instability – common limitations of potentiometry for SC-ISEs. The selectivity in flowinjection and constant flow amperometric modes is similar to the potentiometric one. Moreover, flow injection amperometry in comparison to potentiometry for ion-selective electrodes provides a shorter response time, within 15–30 s, by two orders of magnitude decreased detection limit and 5-6 fold increased signal-to-noise ratio. The proposed approach is an attractive readout mode that opens new horizons for the improvement of performance characteristics of solid contact ISEs.
- Subjects :
- Detection limit
Materials science
General Chemical Engineering
Flow (psychology)
Potentiometric titration
Analytical chemistry
Response time
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Amperometry
0104 chemical sciences
Electrode
Electrochemistry
0210 nano-technology
Selectivity
Order of magnitude
Subjects
Details
- ISSN :
- 00134686
- Volume :
- 377
- Database :
- OpenAIRE
- Journal :
- Electrochimica Acta
- Accession number :
- edsair.doi...........f0e8ced0c23c73448e77e2513f7eee95