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Sorbent coatings for solid‐phase microextraction based on mixtures of polymeric ionic liquids
Author(s) -
Graham Christa M.,
Meng Yunjing,
Ho Tien,
Anderson Jared L.
Publication year - 2011
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201000367
Subject(s) - sorbent , solid phase microextraction , coating , ionic liquid , chloride , chemistry , extraction (chemistry) , vinyl chloride , chromatography , imide , materials science , gas chromatography–mass spectrometry , organic chemistry , adsorption , mass spectrometry , polymer , catalysis , copolymer
Four polymeric ionic liquids based on two different cations, poly(1‐vinyl‐3‐hexylimidazolium) and poly(1‐vinyl‐3‐hexadecylimidazolium), combined with two different anions, bis[(trifluoromethyl)sulfonyl]imide (NTf 2 − ) and chloride (Cl − ), were combined in various weight percentages and used as sorbent coatings for solid‐phase microextraction gas chromatography (SPME‐GC). The selectivity of the fiber coatings for 12 test analytes was examined. The extraction efficiency of n ‐alcohols increased with an increase in the weight percentage of chloride ion in the sorbent coating. The ability to tune the interactions between the coating material and the analytes was exploited and resulted in distinct changes in the limits of detection for hydrogen‐bonding analytes with varying chloride ion content in the sorbent coating.