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Polydimethylsiloxane-functionalized monolithic silica column for reversed-phase capillary liquid chromatography
Qiaoli Zhou1, Pengfei Zhang, Li Jia
1Ministry of Education Key Laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, P. R. China.
Journal of Separation Science
|November 16, 2011
Summary
A novel polydimethylsiloxane (PDMS)-modified silica column offers effective separation for alkylbenzenes and polycyclic aromatic hydrocarbons (PAHs). This PDMS column shows promise as an alternative to traditional octadecyl columns in chromatography.
Area of Science:
- Analytical Chemistry
- Chromatography Science
Background:
- Reversed-phase chromatography is a key separation technique.
- Octadecyl stationary phases are widely used but alternatives are sought.
Purpose of the Study:
- To develop and characterize a polydimethylsiloxane (PDMS)-modified monolithic silica column.
- To evaluate its performance for separating alkylbenzenes and polycyclic aromatic hydrocarbons (PAHs).
Main Methods:
- Preparation of a PDMS-modified monolithic silica column.
- Performance evaluation using reversed-phase capillary liquid chromatography.
- Analysis of alkylbenzenes and PAHs separation characteristics.
Main Results:
- The PDMS column demonstrated good permeability (6.4×10(-14) m(2)) and low plate height (<9.2 μm).
- Effective separation of alkylbenzenes and PAHs was achieved.
- The PDMS stationary phase exhibited selectivity and separation mechanisms similar to octadecyl phases.
Conclusions:
- Hydrophobic interactions are the primary mechanism for separating alkylbenzenes and PAHs on the PDMS column.
- The PDMS-modified monolithic silica column is a viable alternative to octadecyl columns for these analytes.
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