This is a high resolution, double focusing magnetic sector instrument (BE geometry) with an effective mass range of 1-2000Da at full (8kV) acceleration voltage. It is equipped with EI, CI and FAB ionization methods and can operate in both positive and negative ion modes. It is able to provide both full scan nominal-mass spectra of small molecules and accurate mass determinations. A variety of different samples may be accommodated. Thermally stable liquid or solid (mp<300⁰C) samples may be analyzed with EI and/or CI ionization using heated inlets and probes for sample volatilization. GCMS of volatile sample mixtures is also possible using the attached HP5890 GC, although such analyses are normally performed using the dedicated Shimadzu GC-MS instrument also located within the facility (see below). Less thermally stable samples may be analyzed using FAB ionization, where the sample is mixed with a suitable matrix (typically 3-nitrobenzyl alcohol – mNBA) and introduced on a target probe. The exact method of sample introduction and ionization chosen depends upon the sample to be analyzed. At present, full scan and accurate mass FAB analyses comprise the bulk of the work conducted using this instrument.

This instrument, originally installed in 1986, was overhauled and upgraded in early 2005, which included replacement of the original data system with a modern MSS MasSpecII³² Windows based data system. The instrument is operated by the Facility Manager on a service basis. Guidelines for sample preparation and submission can be found here, along with downloadable sample submission forms (pdf format). This instrument is located in Room B13, Remsen Hall.