High‐Resolution Performance of Polycaprolactone Functionalized with Guanidinium Ionic Liquid for Gas Chromatography

Abstract

This work firstly reported a new polycaprolactone based material functionalized with guanidinium ionic liquid (PCL‐GIL) as the stationary phase with high resolution performance for capillary gas chromatography (GC). It is composed of polycaprolactone (PCL) and guanidinium ionic liquid (GIL) with amphiphilic conformation. The PCL‐GIL capillary column coated by static method exhibited high column efficiency of 3942 plates/m and moderate polarity. As a result, the PCL‐GIL column exhibited high‐resolution capability. For a mixture of 27 analytes with a wide ranging polarity and outperformed the PCL‐2OH and HP‐35 columns, showing its advantageous separation capability for analytes of diverse types. Moreover, the PCL‐GIL column showed high resolving capability for various positional isomers and cis‐/trans‐isomers, including alkylbenzenes, chlorobenzenes, naphthalenes, bromonitrobenzenes, chloronitrobenzenes, benzaldehydes, phenols, alcohols, respectively. In a word, PCL derivatized by GIL units as a new type of stationary phase has a promising future in GC separations.

Hydroxyl-functionalized pillar[5]arene with high separation performance for gas chromatography

“…6 It is also of paramount necessity in chemical and environmental fields to selectively separate tough isomers with similar structures and properties, such as halogenated benzenes and aromatic amines. 7–12 However, commercialized polysiloxane (PDMS), polyethylene glycols (PEG) and ionic liquids (ILs) columns tend to show partial overlapped or coeluted peaks when separating challenging isomers, degrading the accuracy of the analysis. 13–17 Sample derivatization and inactivation are currently applied to solve the above problem, which requires additional procedures but results in extra expenditure and low efficiency.…”