title: Multiple headspace extraction for gas detection in ionic liquids.
abstract: In this study multiple headspace extraction was used for the first time to measure the saturation concentration of carbon monoxide and oxygen in various ionic liquids (ILs). Many processes in ILs involve the reaction of gases so that the reactant solubility is not a mere characteristical parameter, but understanding the solubility of gases in ILs is required for assessing the feasibility of possible applications. Multiple headspace extraction has proofed to be a powerful tool to obtain solubilities in good accordance with literature data. The measured saturation concentration for carbon monoxide and oxygen in ILs based on rarely researched tetracyanoborates and other anions was in the range of 1.5-6.5mmol/L. The great advantage of multiple headspace extraction is that it is a nonexpensive method that can be realised in most analytical laboratories by combination of a simple gas chromatograph and an eligible headspace injector.
authors.affiliation: Fraunhofer Institut für Chemische Technologie, Joseph-von-Fraunhofer-Str. 7, D-76327 Pfinztal (Berghausen), Germany.
authors.forename: D
authors.initials: D
authors.lastname: Müller
authors.affiliation: Fraunhofer Institut für Chemische Technologie, Joseph-von-Fraunhofer-Str. 7, D-76327 Pfinztal (Berghausen), Germany.
authors.forename: M
authors.initials: M
authors.lastname: Fühl
authors.affiliation: Fraunhofer Institut für Chemische Technologie, Joseph-von-Fraunhofer-Str. 7, D-76327 Pfinztal (Berghausen), Germany.
authors.forename: K
authors.initials: K
authors.lastname: Pinkwart
authors.affiliation: Fraunhofer Institut für Chemische Technologie, Joseph-von-Fraunhofer-Str. 7, D-76327 Pfinztal (Berghausen), Germany. Electronic address: norman.baltes@ict.fraunhofer.de.
authors.forename: N
authors.initials: N
authors.lastname: Baltes
keywords: Carbon monoxide; Ethylmethylimidazolium tetracyanoborate; Gas solubility; Ionic liquids; Multiple headspace extraction; Oxygen