Exeter Analytical has developed a reliable analytical method for accurately
determining the percentage Carbon (C), Hydrogen (H) and Nitrogen (N) content of
polyfluorinated compounds (PFCs).
Polyfluorinated compounds are extremely thermally and chemically stable and
have soil, water and fat-repellent properties. They are nearly
non-biodegradable and accumulate in the environment and the food chain. Due to
their specific technical characteristics - polyfluorinated compounds are used
in quite a number of products such as in textiles, carpets, cosmetics, paper,
packaging materials as well as in general in the chemical synthesis,
metallation, photo and semi-conductor industries.
Generally compounds containing fluorine can be successfully analysed for
percentage CHN content on an elemental microanalysis system under standard
operating conditions. The magnesium oxide in the combustion tube reagent
packing absorbs fluorine as HF, and releases the hydrogen. However,
polyfluorinated samples, which are often difficult to combust, can give
incorrect low carbon and high nitrogen data.
For these highly fluorinated compounds, Exeter Analytical have developed a new
reliable analytical method based upon their Model 440 Elemental Analyser that
is described in Application Note 217.
For a copy of application note 217 please visit www.exeteranalytical.co.uk/ce440_notes.htm
or contact Exeter Analytical on +44-2476-323223 / +1-978-251-1411 or email info@exeteranalytical.co.uk / sales@eai1.com.
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