Related Experiment Video
Updated: Nov 3, 2025
07:23
Fabrication of Thin Film Silver/Silver Chloride Electrodes with Finely Controlled Single Layer Silver Chloride
Published on: July 1, 2020
14.5K
A bespoke chloride sensor for seawater: Simple and fast with a silver electrode
Yanjun Guo1, Richard G Compton1
1Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK.
Talanta
|June 2, 2021
Summary
A new electrochemical method accurately quantifies chloride in seawater using silver oxidation. This facile sensor works for high chloride levels, crucial for oceanography and corrosion science.
Area of Science:
- Electrochemistry
- Oceanography
- Corrosion Science
Background:
- Accurate chloride quantification is vital for oceanography and corrosion science.
- Existing methods may not be suitable for high chloride concentrations found in seawater.
Purpose of the Study:
- To develop a facile and accurate electrochemical sensor for chloride quantification in natural seawater.
- To validate the sensor's performance at high chloride concentrations (approx. 0.5 M).
Main Methods:
- A bespoke electrochemical method based on the voltammetric oxidation of a silver electrode.
- Utilizing silver chloride (AgCl) nucleation and formation.
- Employing dissolved oxygen reduction for electrode surface cleaning and stable potential referencing.
Main Results:
- A linear relationship was observed between peak current and chloride concentration in the range of 0.484 M to 0.624 M.
- The method demonstrated reliable quantification in synthetic and natural seawater samples.
- Results showed excellent agreement with independent analyses.
Conclusions:
- The developed electrochemical method provides a facile and accurate means for chloride quantification in seawater.
- The sensor is suitable for the high chloride levels characteristic of marine environments.
- This technique offers a valuable tool for both oceanographic research and corrosion studies.
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