Issue 6, 2008

Synchrotron radiation induced TXRF

Abstract

The use of synchrotron radiation (SR) as an excitation source for total reflection X-ray fluorescence analysis (TXRF) offers several advantages over X-ray tube excitation. Detection limits in the fg range can be achieved with efficient excitation for low Z as well as high Z elements due to the features of synchrotron radiation and in particular the high brilliance in a wide spectral range and the linear polarization in the orbital plane. SR-TXRF is especially interesting for samples where only small sample masses are available. Lowest detection limits are typically achieved using multilayer monochromators since they exhibit a bandwidth of about 0.01 ΔE/E. Monochromators with smaller bandwidth like perfect crystals, reduce the intensity, but allow X-ray absorption spectroscopy (XAS) measurements in fluorescence mode for speciation and chemical characterisation at trace levels. SR-TXRF is performed at various synchrotron radiation facilities. An historical overview is presented and recent setups and applications as well as some critical aspects are reviewed.

Graphical abstract: Synchrotron radiation induced TXRF

Article information

Article type
Critical Review
Submitted
18 Dec 2007
Accepted
10 Apr 2008
First published
06 May 2008

J. Anal. At. Spectrom., 2008,23, 792-798

Synchrotron radiation induced TXRF

C. Streli, P. Wobrauschek, F. Meirer and G. Pepponi, J. Anal. At. Spectrom., 2008, 23, 792 DOI: 10.1039/B719508G

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