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Fluorine Content

Measuring Fluorine Content with TD-NMR

Time Domain Nuclear Magnetic Resonance (TD-NMR) is widely used in a variety of industries to measure fluorine content. Fluoride in toothpaste is highly regulated because it is treated as a pharmaceutical; similarly, TD-NMR can be used to measure the amount of active ingredient in other pharmaceuticals which contain fluorine. TD-NMR can also be used to measure the purity of fluorine containing minerals and polymers. TD-NMR is unique in that it is possible to measure Fluorine in powders and other solids as is. In contrast, methods such as ion chromatography or ion electrode require the matrix to be broken up.


Fluorinated coatings are often applied to artificial fibres and textiles to provide oil/water resistance, easy cleaning and fire-retardant properties; they are commonly used for carpets, outdoor and other high-performance clothing. Therefore, it is important to regulate the amount of fluorinated coating to optimise the process and, as a result, the properties of the product. TD-NMR provides a fast, simple and accurate method of measuring fluorinated coatings

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The fluorine content of fluorspar is important because it determines its grade and therefore its eventual use in the steel, aluminium or chemical industry. The highest grade is used to produce hydrogen fluoride which is a precursor to many important compounds including pharmaceuticals and polymers, e.g. polytetrafluoroethylene (PTFE), known by the commercial name of Teflon.

Fluorine is also an important element used in aluminium production by electrolysis therefore measurement of the concentration in raw materials (aluminium fluoride, cryolite) and the emissions/losses (fluorine absorbed on secondary alumina) are measured to optimise the process. TD-NMR provides a fast, simple and accurate method of measuring fluorine in minerals and other powders.

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