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Comprised of an HP 5890 GC
interfaced to a HP 5972 Mass Selective Detector Quadrupole Mass
Spectrometer, the system uses electron impact (EI) ionization to produce
mass fragmentation and is capable of performing full mass scans or
selective ion monitoring (SIM) of one or more specific masses. The system is equipped with one
split/splitless capillary injection port which will accommodate liquid,
headspace, or SPME injections.
Detection limits depend on the mass range under consideration, but
femtogram levels are reported possible using SIM. Separation and detection
limits are affected by the boiling point of the sample (up to 350 C) and
the mass of the analyte (permissible range: 10 - 650 amu).
An autosampler is available for automated liquid injections. Capillary
columns that we own include: SPB1 (30m X 0.25mm, 1uM film), DB5-MS &
MDN-5 (30m X 0.25mm, 0.25uM film), DB624 (60m X 0.32mm, 1.8uM film) and
SP2380 (30m X 0.25mm, 0.20uM film).
Users are invited to supply their own columns if another type is
required.
Samples to be injected directly into the GC must be either gasses or
particle-free organic liquids. Typical solvents include hexane, methanol,
and methylene chloride. The autosampler can accommodate 2mL vials. Vial
inserts allow samples volumes of as little as ~25 uL.
Contact GEL staff to discuss your application needs in more detail.
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