Atomic spectrometry update-X-ray fluorescence spectrometry. Margaret West * a, Andrew T. Ellis b, Philip J. Potts d, Christina Streli c, Christine Vanhoof e, Dariusz Wegrzynek f and Peter Wobrauschek c a West X-ray Solutions Ltd, 405 Whirlowdale Road, Sheffield, S11 9NF, UK b Oxford Instruments X-ray Technology, 360 El Pueblo Road, Scotts Valley, CA 95066, USA c Vienna University of Technology