Open tubular layer of S-ofloxacin imprinted polymer fabricated in silica capillary for chiral CEC separation

J Sep Sci. 2009 Apr;32(7):996-1001. doi: 10.1002/jssc.200800631.

Abstract

An open tubular molecule imprinted polymer (OT-MIP) capillary column has been prepared for chiral separation of ofloxacin enantiomers in CEC. The S-ofloxacin imprinted OT column was fabricated by thermally initiated non-covalent polymerization procedure inside a pretreated and silanized fused silica capillary. The template molecule was incorporated with methacrylic acid (MAA), ethylene glycol dimethacrylate (EDMA) and 4-styrenesulfonic acid (4-SSA) and dissolved in a porogen mixture of ACN/2-propanol (9:1). The separation efficiency of the 4-SSA MIP column was found quite better than that of the MIP column without 4-SSA. It has been demonstrated that our OT-MIP column can separate ofloxacin enantiomers with excellent chiral separation efficiency after tuning the various chromatographic conditions. The optimized chromatographic eluent was 85:15, v/v%, ACN/60 mM sodium acetate at pH 7. The separation efficiency and selectivity of chiral separation of this study were far better than those obtained by previous methods for chiral separation of R- and S-ofloxacin.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Buffers
  • Capillary Electrochromatography / instrumentation*
  • Capillary Electrochromatography / methods*
  • Hydrogen-Ion Concentration
  • Microscopy, Electron, Scanning
  • Molecular Imprinting
  • Molecular Structure
  • Ofloxacin / chemistry*
  • Polymers / chemistry*
  • Reproducibility of Results
  • Silicon Dioxide / chemistry*
  • Stereoisomerism
  • Styrenes
  • Sulfonic Acids

Substances

  • Buffers
  • Polymers
  • Styrenes
  • Sulfonic Acids
  • Silicon Dioxide
  • Ofloxacin