Potentiometric Response of AgAgCl Chloride Sensors in Model Alkaline Medium
Joint Authors
Pargar, Farhad
Kolev, Hristo
Koleva, Dessi A.
van Breugel, Klaas
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-06-28
Country of Publication
Egypt
No. of Pages
12
Abstract EN
The stability and reproducibility of an Ag/AgCl sensors’ response in an alkaline medium are important for the application of these sensors in cementitious materials.
The sensors’ response, or their open circuit potential (OCP), reflects a dynamic equilibrium at the sensor/environment interface.
The OCP response in an alkaline medium is affected by the presence of hydroxide ions.
The interference of hydroxide ions leads to inaccuracies or a delay in the sensors’ response to a certain chloride content.
In this article, the potentiometric response (or OCP evolution) of the chloride sensors is measured in model solutions, resembling the concrete pore water.
The scatter of the sensors’ OCP is discussed with respect to the interference of hydroxide ions at varying chloride concentration in the medium.
The deviation of the sensor’s response from its ideal performance (determined by the Nernst law) is attributed to dechlorination of the AgCl layer and the formation of Ag2O on the sensor’s surface.
Results from the surface XPS analysis of the AgCl layer before and after treatment in alkaline medium confirm these observations in view of chemical transformation of AgCl to Ag2O.
American Psychological Association (APA)
Pargar, Farhad& Kolev, Hristo& Koleva, Dessi A.& van Breugel, Klaas. 2018. Potentiometric Response of AgAgCl Chloride Sensors in Model Alkaline Medium. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1121887
Modern Language Association (MLA)
Pargar, Farhad…[et al.]. Potentiometric Response of AgAgCl Chloride Sensors in Model Alkaline Medium. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1121887
American Medical Association (AMA)
Pargar, Farhad& Kolev, Hristo& Koleva, Dessi A.& van Breugel, Klaas. Potentiometric Response of AgAgCl Chloride Sensors in Model Alkaline Medium. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1121887
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1121887