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Updated: Mar 11, 2026
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Dynamic Electrochemical Measurement of Chloride Ions
Published on: February 5, 2016
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Amperometric Sensor for Detection of Chloride Ions
Libuse Trnkova1, Vojtech Adam2,3, Jaromir Hubalek4
1Department of Chemistry, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic.
Sensors (Basel, Switzerland)
|November 23, 2016
Summary
This study developed a sensitive electrochemical sensor for chloride ion detection. Modified carbon paste electrodes, especially those with silver particles, achieved low detection limits, enabling miniaturized instrumentation for environmental and clinical monitoring.
Area of Science:
- Electrochemistry
- Analytical Chemistry
- Materials Science
Background:
- Chloride ion sensing is crucial for clinical diagnosis, environmental monitoring, and industrial applications.
- Conventional sensing methods often require complex instrumentation.
- Developing sensitive and portable sensors is a key research objective.
Purpose of the Study:
- To develop and optimize electrochemical sensors for sensitive chloride ion detection.
- To investigate the performance of modified carbon paste electrodes (CPEs).
- To miniaturize the electrochemical instrument for practical applications.
Main Methods:
- Chloride ion detection using a carbon paste electrode (CPE) and CPE modified with silver nitrate (AgNO₃) or silver particles.
- Electrochemical measurements were performed using a potentiostat, screen-printed electrodes, and a peristaltic pump.
- Optimization of experimental conditions including buffer (Britton-Robinson), pH (1.8), and working electrode potential (550 mV).
Main Results:
- The CPE modified with silver particles exhibited the highest sensitivity, with a detection limit of 10 μM for chloride ions.
- A miniaturized electrochemical instrument achieved a detection limit of 500 nM under optimized conditions.
- Different modifications of CPEs showed varying sensitivities to chloride ions.
Conclusions:
- Electrochemical sensing using modified CPEs, particularly with silver particles, offers a sensitive method for chloride ion detection.
- Miniaturization of electrochemical instruments enables portable and efficient chloride ion monitoring.
- The developed sensor system holds promise for real-time clinical and environmental analysis.
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