Glass Based Electrodes for the Determination of Redox Potentials in Water Samples

The state of e.g. waste and process water depending on the particular application can be characterized by quantitative analysis of its composition (e.g. heavy metal ions, nitrate or phosphate) but often, at least in a complementary manner, by determinating of non-specific parameters like electrolyti...

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Bibliographic Details
Published inSensors & transducers Vol. 184; no. 1; p. 39
Main Authors Gerlach, Frank, Ahlborn, Kristina, Sachse, Sandra, Vonau, Winfried
Format Journal Article
LanguageEnglish
Published Toronto IFSA Publishing, S.L 01.01.2015
Subjects
Biofilms
Compressed air
Electrode potentials
Electrodes
Glass
Glass membrane
Indicators
Influence
Media
Metals
Noble metals
Phosphates
Potentiometry
Quantitative analysis
Redox potential
Sensor
Sensors
Thick film
Thin film
Transducers
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Summary:The state of e.g. waste and process water depending on the particular application can be characterized by quantitative analysis of its composition (e.g. heavy metal ions, nitrate or phosphate) but often, at least in a complementary manner, by determinating of non-specific parameters like electrolytic conductivity or redox potential. The latter is usually measured potentiometrically using indicator electrodes of precious metals. However, their application is connected with measurement errors caused by interactions between the media and the noble metal surfaces. Specifically this problem occurs in real media that can be found in process chemistry and in waste water sector, for example. Using electron conducting glass instead of noble metal membranes in potentiometric redox electrodes solves this problem. We present possibilities for their fabrication and results from their characterization and use.
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ISSN:2306-8515
1726-5479