X-Ray Fluorescence
Major element compositions of rocks, soils, and sediment are obtained by X-Ray fluorescence spectroscopy, using a computer-controlled Rigaku 3270 wavelength-dispersive spectrometer with a 60 kilowatt generator, a Rh X-Ray tube, and six-sample changer. Samples are prepared by fusion in a muffle furnace using a 9:1 ratio of pure lithium tetraborate flux to powdered sample. We routinely measure Si, Ti, Al, Fe, Na, K, Ca, Mg, Mn, P, and Zr, and maintain quality control with a suite of international and lab rock standards. Most applications are for analysis of crustal rocks, soils, and sediments; other specialized applications have been developed as needed, however, such as steel slag and concrete analysis. The XRF lab complements the XRD and ICP-MS labs, providing excellent analytical capabilities for a wide range of geological and environmental materials.Although we are not a high-throughput lab, the XRF facility is available on a contract basis, primarily for academic users. Per-sample prices are comparable to other academic labs, but discounts are available for students and for larger projects. For more information on the lab, including a price quote for major element analysis, contact Dr. Deocampo at 404-413-5759 or by email.
