Xiaojia Huang, Yulei Wang, Qiuyun Hong, Yi

Liu, Dongxing Yuan.Journal of Chromatography, 2013. 1314: 7-14.

A new multi-interaction sorbent (MIS) based on polymeric ionic

liquid was prepared and used as extractive medium of stir cake sorptive

extraction (SCSE). In the presence of dimethyl sulfoxide, an ionicliquid,

1-vinylbenzyl-3-methylimidazolium chloride was used as monomer to copolymerize

in situ withdivinylbenzene to form the MIS. The influences of the content of

monomer and the porogen solvent inthe polymerization mixture on the extraction

performance were investigated thoroughly. The MIS wascharacterized by infrared

spectroscopy, elemental analysis, scanning electron microscopy and

mercuryintrusion porosimetry. Parabens and aromatic amines were used to

investigate the extraction performance of MIS-SCSE for apolar and strongly

polar analytes, respectively. The extraction parameters forparabens and

aromatic amines were optimized. At the same time, simple and sensitive

analytical methodsfor parabens and aromatic amines in real samples were

developed by the combination of MIS-SCSE andHPLC/DAD. Some inorganic anions,

such as F−,

Br−, NO3−, PO43−and SO42−, were used to test the

extraction performance of MIS-SCSE for anions. Results indicated that mechanism

involved in the extraction ofMIS is the multi-interaction modes including- _,

hydrophobic, hydrogen-bonding, dipole–dipole andanion-exchange interactions.

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