A silica-based monolithic column in capillary HPLC and CEC coupled with ESI-MS or electrospray-atmospheric-pressure laser ionization-MS

Electrophoresis. 2005 Nov;26(21):4098-103. doi: 10.1002/elps.200500326.

Abstract

We describe the successful coupling of CEC and capillary HPLC with the recently developed atmospheric-pressure laser ionization (APLI) method. APLI is suitable for selectively and sensitively ionizing nonpolar aromatic compounds at ambient pressure for subsequent mass-selective detection. The polycyclic aromatic hydrocarbons used as analytes are first separated either by CEC on a silica-based monolithic column or by capillary HPLC. The eluent, along with a sheath flow, is volatilized by microelectrospray and then selectively ionized by excimer laser (KrF*) radiation via two-photon excitation. A QTOF-MS is used as mass-selective detector. This interface combination makes soft ionization of thermally labile nonpolar aromatic analytes possible.

MeSH terms

  • Chromatography, High Pressure Liquid / instrumentation
  • Chromatography, High Pressure Liquid / methods*
  • Electrophoresis, Capillary / instrumentation
  • Electrophoresis, Capillary / methods*
  • Equipment Design
  • Polycyclic Aromatic Hydrocarbons / isolation & purification*
  • Silicon Dioxide
  • Spectrometry, Mass, Electrospray Ionization / instrumentation
  • Spectrometry, Mass, Electrospray Ionization / methods*

Substances

  • Polycyclic Aromatic Hydrocarbons
  • Silicon Dioxide