Fluoride Electrode

SRK's fluoride meter is one of several optional ion-selective electrodes (ISE) compatible with SRK's multi-parameter water testing equipment. The fluoride ISE is sensitive to the concentration of fluoride ions in aqueous solutions. As a solid-state sensor, it contains no internal liquid, allowing it to be stored dry with a shelf life of more than one year.

Ion-selective electrodes belong to a group of relatively simple and cost-effective analytical tools, often referred to as sensors or electrodes. Fluoride ion-selective electrodes fall into this category and are commonly used to demonstrate the basic operating principles of ISE technology.

Fluoride ISE sensors are used to measure the concentration and activity of fluoride in aqueous solutions. Common application areas include drinking water, bone, cement, fish protein, glass, phosphate minerals, and toothpaste analysis. It is also possible to measure aluminium ion concentration without a dedicated aluminium electrode: by adding a sodium fluoride solution to the sample, aluminium is precipitated as aluminium fluoride, allowing the fluoride ISE to indirectly determine aluminium concentration.

ISE is the preferred method for fluoride testing, as it experiences less interference than most alternative methods — although the electrode remains susceptible to interference from hydroxide (OH-) ions due to their similar chemical nature. SRK's fluoride meters are accurate to within +/- 10% of the reading and, depending on the equipment selected, can be deployed for long-term, unattended water quality monitoring. Our ISE fluoride sensors are ideally suited for measuring fluoride concentrations in water within the 0–1,000 mg/L (ppm) range.