DEPARTMENT INSTRUMENTATION

To see pictures of the actual instruments click on the instruments name. (Individual research groups have specialized instrumentation, such as lasers, lock-in amplifiers and thermal cyclers that are not included here.)

1. Gas Chromatography and Mass Spectrometry. The department has three Hewlett-Packard 5890 GC’s. One with a flame ionization detector and two with mass spectrometric detection. The first instrument is a bench model with mass range to 600 amu. The detector is capable of electron impact and chemical ionization. The second instrument has a much larger mass range (1000 amu max) with a direct insertion probe for solid samples.

2. High Performance Liquid Chromatography. A) The Waters HPLC ternary gradient system has a diode array UV/visible detector. B) A second HPLC instrument with a fraction collector resides in the biochemistry lab. It has been used primarily for protein separations and preparative work.

3. Capillary electrophoresis. This instrument is a Beckman Pace 5010 model with both UV absorption and laser induced fluorescence detectors. It has an auto-sample tray. (We also have several different types of standard slab gel electrophoresis instruments.)

4. FTIR. Our instrument is from Laser Precision Analytical (model RFX-40). It has a dry nitrogen purge and accessories for doing diffuse reflectance spectra from solids.

5. Electroanalysis. The Department has a Bioanalytical Systems Electrochemistry station for doing all sorts of voltammetry and coulometry. We have ultra-micro electrodes and the low current module and a high current module for doing bulk electrolysis and a homemade rotated disk system as well.

6. Fluorescence. Our spectrofluorometer is a Fluoromax from Spex. It is capable of recording excitation, emission or synchronous fluorescence spectra. We also have a flow cell for this instrument.

7. Atomic Spectroscopy. A) Inductively-Coupled Plasma Atomic Emission Spectrometer. We purchased a Jobin-Yvonne spectrometer recently that is capable of parts per billion level detection limits on most elements on the periodic chart. Since it is an emission instrument it is well suited for doing surveys for many metals simultaneously. B) The Perkin-Elmer atomic absorption spectrophotometer uses an acetylene/air flame. We have lamps for doing several elements including Ca, Mg, Fe, Zn, and Cu.

8. NMR. Our instrument is a 300 MHz FT-NMR from Bruker. It has a standard 1H and 13C probe and a multi-element probe as well.

9. UV/Visible absorption spectrometry. We have a diode array instrument (HP model 8452) and two rapid scanning Shimadzu dual beam instruments. There are also many desk-top simple photometers in various labs as well.

10. Centrifuges. We have a Sorvall RC-5B+ refrigerated centrifuge with several different sizes of rotors. We also have three Sorvall Microcentrifuges.

11. Glovebox. For working with air- or moisture-sensitive compounds, we have a stainless steel glovebox.

12. Crystallographic facilities. The Department, through collaboration with the X-ray Crystallographic Laboratory of the University of Minnesota, obtains low-temperature X-ray diffraction data sets through the use of the Bruker-AXS CCD diffractometers of the XCL. These data sets are then transferred to a UST Chemistry Department laboratory for structure solution and refinement. For this purpose, the Department has acquired its own copy of the SHELXTL crystallographic software package. The Department also maintains up-to-date releases of the Cambridge Structural Database, useful for structure searches and molecular geometry analyses.