Journal
CHROMATOGRAPHIA
Volume 69, Issue 9-10, Pages 1093-1096Publisher
SPRINGER HEIDELBERG
DOI: 10.1365/s10337-009-1028-9
Keywords
Micellar electrokinetic capillary chromatography; Ionic liquids; Cationic surfactant; 1-Hexadecyl-3-methylimidazolium bromide; Phenolic compounds
Funding
- National Natural Science Foundation of China [20475058, 20775084]
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The ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C(16)MIm]Br) has been used as a novel cationic surfactant for separation of phenolic compounds, including quinol, phloroglucinol, resorcinol, phenol, p-cresol, and m-nitrophenol, by micellar electrokinetic capillary chromatography (MEKC). The effects of buffer concentration and pH, concentration of [C(16)MIm]Br, and applied potential were studied. Use of the optimized buffer (25 mmol L-1 NaH2PO4), 10 mmol L-1 [C(16)MIm]Br, and an applied potential of -15 kV enables optimum separation with regard to resolution and migration time. The phenolic compounds were detected at 214 nm. The micelle of this long-alkyl-chain imidazolium ionic liquid acts as a pseudo-stationary phase in this MEKC separation.
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