OPTIMIZATION OF SOLVENT FOR THE EXTRACTION OF PERFLUOROOCTANOIC ACID(PFOA) FROM A POLYTETRAFLUOROETHYLENE RESIN
Journal: i TECH MAG (Research Article)
Author: Koji Furukawa, Makoto Hashimoto, Hiromu Motozawa, Satoshi Kaneco
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
The optimization of the extraction conditions of perfluorooctanoic acid (PFOA) from a polytetrafluoroethylene (PTFE) fine resin powder was investigated in this work. A PTFE resin containing a high concentration of PFOA was used for the optimization. From the optimization results, the effective extraction solvents were determined to be methanol and acetone, and their PFOA‒analyzed concentrations were 9840 ng/g and 9520 ng/g with relative standard deviation (RSD) values of 4.1% and 2.6%, respectively, based on three measurements. Conversely, the PFOA could not be extracted using hexane as the solvent. The reproducibility of the PFOA analysis in PTFE fine resin powder by the extraction with methanol was investigated. As a result, the recovery for the spiked PFOA in the PTFE resin was 108±6% (N=5). Conclusively, the developed method for the extraction of PFOA in the PTFE fine resin powder was considered satisfactory.