Long‐chain alkylimidazolium ionic liquids, a new class of cationic surfactants coated on ODS columns for anion‐exchange chromatography

Abstract

Separations of common inorganic anions were carried out on ODS columns coated with two long-chain alkylimidazolium ionic liquids ([C(12)MIm]Br and [C(14)MIm]Br) as new cationic surfactants for ion chromatography. With phthalate buffer solution as the mobile phases and non-suppressed conductivity detection, high column efficiencies and excellent selectivity were obtained in the separation of inorganic anions. Chromatographic parameters are calculated and the results show that the coated column possesses significant potential for the analysis of some inorganic anions such as CH(3)COO(-), IO(3)(-), Cl(-), BrO(3)(-), NO(2)(-), Br(-), NO(3)(-), SO(4)(2-), I(-), BF(4)(-), and SCN(-). The effect of eluent pH values on the separation of anions has been studied on the column coated with [C(12)MIm]Br. The stability of the coated columns was also examined.

Self-assembly in aqueous solutions of imidazolium ionic liquids and their mixtures with an anionic surfactant

“…ILs can replace traditional surfactants in manufacturing nano-structured materials [26]. The self-assembly of ILs may have serious impact in extraction and chromatography [1,[27][28][29][30][31][32]. ILs that combine properties of a surfactant and a catalyst are promising agents for micellar catalysis.…”

Application of Ionic Liquids in High Performance Reversed-Phase Chromatography

“…Although the separation of bio-compounds has been successful under normal phase conditions, it is better to apply these stationary phases to bio-separation in RP-HPLC. According to the paper [55], a mixture of cytosine, thymine, adenine, 2-aminopyrimidine and 6-chloroguanine was separated using water as the mobile phase (Figure 4). …”

Synthesis and Characterization of Surface‐Active Ionic Liquids Used in the Disruption of Escherichia Coli Cells

“…[17] Due to their tunable structure, these compounds allow to design many new families and types of surfactants. A number of analytical applications have emerged in separation science regarding the use of SAILs, not only as solubilization media for proteins, [18] and cell disruption, [19,20] but also in analytical techniques, namely chromatography or electrophoresis, [21][22][23][24] in biocatalysis [25] and also in extractive, preconcentration and recovery techniques. [11,26,27] The potential industrial application of SAILs, as well as their impact on the environment, is closely dependent on their self-assembly behavior and aggregate structure in aqueous solution.…”