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OnCampusRates2002.pdf
OffCampusRates2002.pdf
MS Order Form
Acrobat
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The Hewlett-Packard Mass Selective Detector, a
dedicated GC/MS instrument, is located in room 1207 of the Henry Eyring
Chemistry Building (North). This instrument is used for research and teaching.
Individual operation of the MSD is encouraged after a small checkout procedure.
Features:
- Electron Impact Ionization (EI)
Electron impact ionization (EI) is the classical ionization method
used in mass spectrometry. Samples are thermally desorbed (standard
solids probe, high temperature probe) or introduced through a
gas chromatograph and thus must be thermally stable. EI is a highly
informative method as it provides fragmentation information in
addition to molecular weight. In may cases a library search can
be used to assist in structural identification.
- Chemical Ionization upon request (methane)
Chemical ionization (CI) is a complementary technique to EI. Sample
introduction is that same of EI so this method is limited to thermally
stable compounds. The ion source is maintained at high pressure
with a CI reagent gas such as methane or isobutane and the spectrum
shows a quasimolecular ion with little or no fragmentation. CI
is a soft ionization method used to get the molecular weight of
a thermally stable, volatile compounds.
- 10 - 650 amu scan range
- Easy operation
- Analysis can be performed by investigator
- Library search available
[ LCQ Classic (new!) ] [ Micromass Quattro II ] [ HP MS Detector ] [ Finnigan MAT 95 ]
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