Accurate elemental (CHN) analysis of perfluorinated compounds
Most compounds containing fluorine can be run successfully analysed for percentage CHN content on an elemental microanalysis system under standard operating conditions. The magnesium oxide in the combustion tube reagent packings absorbs fluorine as HF, and releases the hydrogen. However, perfluorinated samples, which are often difficult to combust, can give incorrect low carbon and high nitrogen data. For these highly fluorinated compounds, Exeter Analytical has developed a new method based upon their Model CE440 Elemental Analyser.
Application note TM217 describes the new high temperature method and demonstrates how theoretical values of zero percent nitrogen and 22.10% carbon on a sample of perfluoro-N-octanoic acid were obtained.
Most read news
Organizations
Other news from the department research and development
Get the analytics and lab tech industry in your inbox
From now on, don't miss a thing: Our newsletter for analytics and lab technology brings you up to date every Tuesday. The latest industry news, product highlights and innovations - compact and easy to understand in your inbox. Researched by us so you don't have to.