Buffers for fluoride electrode calibration in the low concentration range.
1Department of Chemistry, Warsaw University, Warsaw, Poland.
Talanta
|October 1, 1979
Summary
Thorium-buffered fluoride standards enable accurate calibration of fluoride electrodes at very low concentrations. Contamination in reagents and water limits practical use to approximately pF 6.
Area of Science:
- Analytical Chemistry
- Electrochemistry
Background:
- Accurate measurement of low fluoride concentrations is crucial in various environmental and industrial applications.
- Fluoride electrodes offer Nernstian response across a wide concentration range.
Purpose of the Study:
- To describe thorium-buffered fluoride standards for calibrating fluoride electrodes.
- To identify limitations in low-level fluoride measurements.
Main Methods:
- Development and utilization of thorium-buffered fluoride standards.
- Calibration of fluoride electrodes using the developed standards.
Main Results:
- Thorium-buffered standards allow for Nernstian response of fluoride electrodes down to very low fluoride levels.
- Practical measurement limits are observed around pF 6 due to contamination.
Conclusions:
- Thorium-buffered standards are effective for low-level fluoride electrode calibration.
- Contamination from distilled water and reagents presents a significant challenge for ultra-trace fluoride analysis.
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