Overview of Reference Electrodes
A reference electrode is used as a benchmark in electrochemical measurements, primarily in batteries and sensors. It provides a stable reference point for measuring voltage (potential).
Necessity of Reference Electrodes
Since voltage is measured as a difference, a reference point is essential. For instance, to determine how much a river’s water level has risen, you need a baseline water level. Similarly, to measure voltage accurately, you need a reference point with a known potential.
Features of Reference Electrodes
- Stable Potential: A reference electrode is designed to maintain a constant potential, ensuring accurate measurements of other electrodes’ potentials.
- Durability: It is built to retain its potential even after repeated measurements.
Common Types of Reference Electrodes
- Silver Chloride Electrode (Ag/AgCl Electrode): This is the standard reference electrode widely used in various experiments and measurements.
- Calomel Electrode: This electrode uses mercury, and although its usage has decreased due to safety concerns, it was commonly used in the past.
Real-Life Examples
Reference electrodes are utilized in many fields, such as water quality testing and food acidity measurement. For example, a reference electrode is necessary when using a pH meter to check the water quality of a swimming pool.
Related word
Applications
Electrocardiograph electrodes (electrodes for ECG)
Electromyocardiograph electrodes (electrodes for EMG)
Electroencephalograph electrodes (electrodes for EEG)
Electrodes for blood glucose measurement (electrodes for SMBG, CGM, FMG)
