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Issue 10, 2015
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Shading in TXRF: calculations and experimental validation using a color X-ray camera

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Abstract

Absorption effects in total reflection X-ray fluorescence (TXRF) analysis are important to consider, especially if external calibration is to be applied. With a color X-ray camera (CXC), that enables spatially and energy resolved XRF analysis, the absorption of the primary beam was directly visualized for μL-droplets and an array of pL-droplets printed on a Si-wafer with drop-on-demand technology. As expected, deposits that are hit by the primary beam first shade subsequent droplets, leading to a diminished XRF signal. This shading effect was quantified with enhanced precision making use of sub-pixel analysis that improves the spatial resolution of the camera. The measured absorption was compared to simulated results using three different model calculations. It was found they match very well (average deviation < 10%). Thus errors in quantification due to absorption effects can be accounted for in a more accurate manner.

Graphical abstract: Shading in TXRF: calculations and experimental validation using a color X-ray camera

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Publication details

The article was received on 07 Apr 2015, accepted on 14 Aug 2015 and first published on 14 Aug 2015


Article type: Paper
DOI: 10.1039/C5JA00127G
Citation: J. Anal. At. Spectrom., 2015,30, 2184-2193
  • Open access: Creative Commons BY license
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    Shading in TXRF: calculations and experimental validation using a color X-ray camera

    M. Menzel, O. Scharf, S. H. Nowak, M. Radtke, U. Reinholz, P. Hischenhuber, G. Buzanich, A. Meyer, V. Lopez, K. McIntosh, C. Streli, G. J. Havrilla and U. E. Adriane Fittschen, J. Anal. At. Spectrom., 2015, 30, 2184
    DOI: 10.1039/C5JA00127G

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