Model No.: GCmate II Manufacturer: JEOL Location: RRC-East, SES 109A

The JEOL GCMate II is a high resolution double focusing magnetic sector benchtop GC mass spectrometer equipped with ion sources for electron impact (EI), chemical ionization (CI) and fast atom bombardment (FAB) by direct insertion probe and is capable of exact mass measurements for elemental composition determinations. The spectrometer is equipped with high energy Collision Induced Dissociation (CID) linked scan unit allowing MS-MS fragmentation experiments (product ion scans, precursor scans, constant neutral loss scans) for use in structural analysis. Mass range is from a low of m/z 1 up to m/z 1000 at full accelerating voltage and up to m/z 3000 at reduced accelerating voltage. Resolution is user selectable from 500 up to 5000. Sensitivity is 30 pg of methyl stearate injected into the GC column producing a S/N of 10:1 at a resolution of 500 for the molecular ion, m/z 298.

An Agilent 6890 GC with Electronic Pressure Control and a split/splitless capillary column injector interfaced to the GCMate allows GC/MS by EI or CI for mixture analysis. An Agilent 7673 Automatic Liquid Sampler (ALS) with 100 vial tray attached to the GC allows unattended sample injections. The mass spectrometer's data processing software automatically bridges to the NIST Mass Spectral Database Library for searching unknown compounds.

The JEOL GCMate II was installed in 2002 and was purchased from internal funds.