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Some new selective stationary phases for RP-HPLC
Isabel C S F Jardim1, Liane Maldaner, Josimara Lourenço
1Institute of Chemistry, State University of Campinas - UNICAMP, Campinas, SP, Brazil.
Journal of Separation Science
|November 2, 2010
Summary
New stationary phases were developed for chromatography, enhancing the separation of complex aromatic and basic pharmaceutical compounds. Immobilization techniques improved phase stability and column longevity for more reliable analyses.
Area of Science:
- Analytical Chemistry
- Chromatography
- Materials Science
Background:
- Complex analyses require selective and stable stationary phases.
- Existing stationary phases have limitations in separating diverse apolar and polar compounds.
Purpose of the Study:
- To develop novel stationary phases with directed selectivities.
- To enhance the stability and chromatographic performance of stationary phases.
Main Methods:
- Immobilization of phenyl- and trifluoropropyl-containing siloxanes onto silica and zirconized silica.
- Utilized thermal treatment and microwave radiation for immobilization.
- Evaluated chromatographic properties, stabilities, and applications.
Main Results:
- Phenyl-containing phases effectively separated aromatic compounds.
- Fluorinated phases showed selectivity for positional isomers and basic pharmaceuticals.
- Immobilization improved phase stability and reduced dissolution.
- Microwave-immobilized phases exhibited slightly higher stability than thermally treated ones.
Conclusions:
- The new stationary phases offer improved selectivity and stability for challenging chromatographic separations.
- Immobilization is a viable strategy to enhance the durability of chromatographic stationary phases.
- Microwave-assisted immobilization presents a promising method for creating robust stationary phases.
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