Efficient total extraction of perfluorooctanoate from polytetrafluoroethylene fluoropolymer

To determine the optimum conditions for the complete extraction of perfluorooctanoate (PFO) from polytetrafluoroethylene fluoropolymers, sample preparation and pressurized solvent extraction (PSE) conditions were investigated. Solvent extraction temperature, solvent residence time, relaxation time b...

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Bibliographic Details
Published in:Analyst (London) 2006-10, Vol.131 (10), p.1105-1108
Main Authors: LARSEN, Barbara S, KAISER, Mary A, BOTELHO, Miguel A, BACHMURA, Stanley F, BUXTON, L. William
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
Other chromatographic methods
Spectrometric and optical methods
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Summary:To determine the optimum conditions for the complete extraction of perfluorooctanoate (PFO) from polytetrafluoroethylene fluoropolymers, sample preparation and pressurized solvent extraction (PSE) conditions were investigated. Solvent extraction temperature, solvent residence time, relaxation time between extractions, and the effects of heating before PSE showed that methanol at 150 degrees C extraction temperature and a 12 min solvent residence time were the most efficient conditions. Preheating the polymer before extraction at 150 degrees C for 24 h significantly enhanced the quantity of PFO removed. Heating above 150 degrees C resulted in loss of PFO. PFO was determined by liquid chromatography with tandem mass spectrometry.
ISSN:0003-2654
1364-5528
DOI:10.1039/b606801d