Abstract
An energy-dispersive X-ray fluorescence system, equipped with air-cooled X-ray tube, Si(Li)-detector, a 20-sample changer, and a minicomputer was adapted to a mobile laboratory, installed in a Landrover 109. With this system different conditions for the excitation of characteristic lines of trace elements were tested and compared with the qualities of a previously used radionuclide-excited system. Up to 18 elements can be determined simultaneously in the course of one measurement (K, Ca, Ti, Mn, Fe, Ni, Cu, Zn, Ga, As, Rb, Sr, Y, Zr, Nb, W, Pb, and Th). For most elements concentrations in common rocks are clearly above the detection limits (e.g., Ni to Pb, 5 ppm; Th, 10 ppm). Two case histories (Kaiserstuhl, F.R.G. and Bastnäs, Central Sweden) demonstrate the applicability of the mobile tube XRF.
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