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Silica-based, hyper-crosslinked acid stable stationary phases for high performance liquid chromatography
Yu Zhang1, Hao Luo, Peter W Carr
1Department of Chemistry, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, MN 55455, USA.
Journal of Chromatography. A
|September 13, 2011
Summary
New hyper-crosslinked (HC) phases offer superior stability in aggressive acidic conditions for ultra-fast, high-temperature liquid chromatography (2DLC). These versatile materials enable diverse selectivities for challenging separations.
Area of Science:
- Chromatography
- Materials Science
- Analytical Chemistry
Background:
- Traditional reversed-phase liquid chromatography (RPLC) phases face limitations in highly acidic and high-temperature environments.
- Developing stationary phases with enhanced acid and thermal stability is crucial for advanced chromatographic applications like 2DLC.
- Hyper-crosslinked (HC) polymers offer a promising platform for creating robust chromatographic materials.
Purpose of the Study:
- To introduce a new family of hyper-crosslinked (HC) stationary phases designed for aggressive acidic conditions and high temperatures.
- To highlight the enhanced acid and thermal stability of HC phases compared to existing commercial RPLC phases.
- To showcase the versatility of HC phases through surface derivatization for diverse chromatographic selectivities.
Main Methods:
- Synthesis of silica-based hyper-crosslinked (HC) polymer networks.
- Surface derivatization of aromatic groups on HC phases with various functional moieties (hydrophobic, ionizable, polar).
- Characterization and application of synthesized HC phases in reversed-phase and mixed-mode chromatography.
Main Results:
- HC phases demonstrate significantly enhanced acid and thermal stability.
- Orthogonal chemistry ensures good reproducibility and high efficiency in HC phase synthesis.
- Derivatization allows for a wide range of chromatographic selectivities, including hydrophobic and mixed-mode (cation exchange) properties.
- Novel HC phase synthesized via alternative chemistry.
Conclusions:
- Acid-stable HC phases offer attractive chromatographic properties for separating challenging analytes, particularly bases and biological molecules, in acidic media at elevated temperatures.
- The tunable nature of HC phases through surface modification provides a versatile tool for chromatographic method development.
- These advanced HC phases are well-suited for demanding applications like ultra-fast, high-temperature 2DLC.
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