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Analyses of benzophenones by capillary electrochromatography using methacrylate ester-based monolithic columns
Hsi-Ya Huang1, Chen-Wen Chiu, I Yun Huang
1Department of Chemistry and Center for Nano Technology, Chung Yuan Christian University, Chung-Li, Taiwan. hyhuang@cycu.edu.tw
Journal of Chromatography. A
|September 1, 2005
Summary
This study optimized capillary electrochromatography for analyzing benzophenones (UV filters). Higher 1-propanol and AMPS content in monolithic columns significantly improved separation and reduced analysis time.
Area of Science:
- Analytical Chemistry
- Separation Science
Background:
- Benzophenones are widely used as UV filters in cosmetics and plastics.
- Efficient separation methods are crucial for analyzing these compounds.
Purpose of the Study:
- To optimize capillary electrochromatography (CEC) for the separation of eight benzophenones.
- To investigate the impact of monolithic column properties and mobile phase composition on separation performance.
Main Methods:
- Analysis of eight benzophenones using capillary electrochromatography.
- Utilized methacrylate ester-based monolithic columns.
- Examined effects of mobile phase composition (acetonitrile, pH), porogenic solvent ratio, and AMPS content.
Main Results:
- Separation performance for benzophenones was significantly enhanced with increased 1-propanol ratio and AMPS content in monolithic columns.
- A twofold increase in AMPS content halved separation time in columns with high 1-propanol ratios.
- Mobile phase acetonitrile levels and pH strongly influenced retention behavior and resolution.
Conclusions:
- Optimized monolithic column composition and mobile phase conditions are key for efficient benzophenone separation via CEC.
- This method offers improved analysis of UV filters in various matrices.