Capillary SFC-APCI-MS characterization of PACs obtained by the fractionation of a contaminated pond sediment
- National Research Council, Halifax (Canada)
- Health Canada, Ottawa, Ontario (Canada)
Capillary supercritical fluid chromotography can be directly coupled to a mass spectrometer by utilizing interfaces based on the direct fluid interface. In these, the capillary restrictor passes through a probe, at the end of which is positioned a heating element used to directly heat the end of the capillary restrictor to prevent solute precipitation and freezing of the mobile phase in the restrictor during decompression. Such SFC interfaces, which pass directly into the source of the MS, suffer from sensitivity problems, especially in the electron impact mode. Many of the problem associated with SFC-MS could effectively be removed if the ionization of the compounds were to occur at atmospheric pressure. Capillary SFC was combined with APCI-MS via heated pneumatic nebulizer interfaces modified for use with SFC, and applied to analyze a complex mixture of polycyclic aromatic compounds obtained by the fractionation of a contaminated pond sediment.
- OSTI ID:
- 61970
- Report Number(s):
- CONF-9405234--; CNN: Project 57118
- Country of Publication:
- United States
- Language:
- English
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