Polymeric ionic liquid bucky gels as sorbent coatings for solid-phase microextraction.
Novel cross-linked polymeric ionic liquid (PIL) bucky gels were formed by free-radical polymerization of polymerizable ionic liquids gelled with multi-walled carbon nanotubes (MWCNT) and used as sorbent coatings for solid-phase microextraction (SPME). The combination of PIL with MWCNTs significantly enhanced the π-π interaction between the sorbent coatings and the aromatic analytes. Compared to the neat PIL-based sorbent coating, the PIL bucky gel sorbent coatings demonstrated higher extraction efficiency for the extraction of polycyclic aromatic hydrocarbons (PAHs). A partitioning extraction mechanism was observed for the PIL/MWCNT-based sorbent coatings indicating that the addition of MWCNTs did not seem to affect the extraction mechanism of the sorbent coating. The analyte-to-coating partition coefficients (logKfs) were estimated and the limits of detection (LOD) for selected PIL bucky gel sorbent coating were determined to be in the range of 1-2.5 ng L(-1). Recovery studies were also performed for PAHs in river and tap water to validate the applicability of the developed method.
['Zhang|Cheng|C|', 'Anderson|Jared L|JL|']
D000327:Adsorption D005618:Fresh Water D005782:Gels D052578:Ionic Liquids D007477:Ions D057230:Limit of Detection D037742:Nanotubes, Carbon D011084:Polycyclic Aromatic Hydrocarbons D011108:Polymers D052617:Solid Phase Microextraction
Polymeric ionic liquids Ionic liquid Solid-phase microextraction Multi-walled carbon nanotubes Polycyclic aromatic hydrocarbons Gas chromatography