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Ion-selective electrodes are part of a group of relatively simple and inexpensive analytical tools commonly referred to as sensors. The pH electrode is the most well-known and simplest member of this group and can be used to illustrate the basic principles of ISEs.
The potassium ISE electrode is intended for measuring potassium ion concentrations and activities in aqueous solutions. Its preferred applications are found in the fields of juices, wine, wastewater, milk, soil, and fertilizer analysis. K ISEs can be used in aqueous solutions over a wide temperature range, up to 40 °C.
With careful use, frequent calibration, and an awareness of the limitations, they can achieve accuracy and precision levels of ±2–3% for some ions and thus compare favorably with analytical techniques that require far more complex and expensive instrumentation.
ISEs are one of the few techniques that can measure both positive and negative ions, and they are unaffected by sample color or turbidity.
In this guide, you will find information about:
- Potassium ISE Theory and Principles
- Electrode and Measurement Setup
- Application Tips and Hints
- ISE Electrode Characteristics
- Common Applications
- Troubleshooting
