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Confocal micro-X-ray fluorescence spectroscopy with a liquid metal jet source

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Abstract

To further widen the applicability of confocal micro-X-ray fluorescence spectroscopy (CMXRF) a novel setup using a liquid metal jet source as excitation was build up and characterized. We present a comparison concerning lateral, depth resolution and performance with state-of-the-art spectrometers using microfocus X-ray tubes. The efficiency of this setup scales with the used power, resulting in a >8-fold intensity increase in the excitation radiation, or measurement time decrease compared to low power X-ray tubes. The adaptation of the excitation lens' transmission to the energy of the characteristic lines additionally increases the sensitivity of the setup, yielding for selected elements an intensity gain of up to a factor of 60. As an application example, a 3D map of a millet seed is evaluated with an uncertainty estimation for incomplete pathway information. With the presented superior performance, full 3D elemental mapping in the laboratory is rendered feasible for classes of samples with low fluorescence intensities such as biological specimen.

Graphical abstract: Confocal micro-X-ray fluorescence spectroscopy with a liquid metal jet source

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Publication details

The article was received on 31 May 2018, accepted on 25 Jul 2018 and first published on 01 Aug 2018


Article type: Paper
DOI: 10.1039/C8JA00174J
Citation: J. Anal. At. Spectrom., 2018, Advance Article
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    Confocal micro-X-ray fluorescence spectroscopy with a liquid metal jet source

    L. Bauer, M. Lindqvist, F. Förste, U. Lundström, B. Hansson, M. Thiel, S. Bjeoumikhova, D. Grötzsch, W. Malzer, B. Kanngießer and I. Mantouvalou, J. Anal. At. Spectrom., 2018, Advance Article , DOI: 10.1039/C8JA00174J

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