University Of Cape Town Geology – X-ray Fluorescence
University Of Cape Town Geology – X-ray Fluorescence
Geology is a fascinating combination of scientific research and exploration. Geologists study the composition, development, and dynamics of the Earth to shed light on its mysteries. They have a number of effective tools at their disposal, including X-ray Fluorescence (XRF) analysis, which gives them access to a plethora of knowledge about rocks and minerals. Geologists at the University of Cape Town are pioneers in the application of this method, providing ground-breaking findings and advances in the discipline.
X-ray Fluorescence
The XRF Facility houses a Panalytical Axios XRF spectrometer and is set up to analyze a wide range of major and trace elements in prepared solid materials. Routine analysis of eleven major elements, Fe, Mn, Ti, Ca, K, S, P, Si, Al, Mg, and Na (with Ni and Cr when Ni and Cr concentrations exceed 2000 ppm or 0.2 %) is determined using fused disks prepared with lithium borate flux.
South Africa boasts the largest number of X-ray fluorescence instruments in the world. These instruments are used heavily in the characterization of ores and the industrial production of steel and cement, among other applications.
Panalytical Axios wavelength-dispersive XRF spectrometer with sample-changer (56 sample capacity) and a rhodium end-window X-ray tube. A Claisse Fluxer is available to aid in the preparation of fusion disks. A hydraulic cold press and die are used for the preparation of powder briquettes. Sample preparation is done using a custom-built hydraulic splitter, and Sturtevant laboratory jaw-crusher, and sample powdering is done using a Seibtechnik swing mill with carbon steel cassettes of various sizes.
X-ray Diffraction
Students are urged to run and analyze their own samples in order to save money because the method is qualitative and the equipment is reasonably simple to use.
The Scientific Officer in charge of the XRD, Mr. Nicholas Laidler, performs external analyses on a first-come, first-served basis for other tertiary institutions and private businesses. The cost of each hour does not include any fees for interpretation or any sample preparation necessary for analysis.
Dr. Phil Janney
phil.janney@uct.ac.za
(021) 650-2929
Lab address:
Rm 1.07, Geological Science