Three-Dimensional Chemical Mapping with a Confocal XRF Setup

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• 作者：Lars L眉hl ; Ioanna Mantouvalou ; Ina Schaumann ; Carla Vogt ; Birgit Kanngie脽er
• 刊名：Analytical Chemistry
• 出版年：2013
• 出版时间：April 2, 2013
• 年：2013
• 卷：85
• 期：7
• 页码：3682-3689
• 全文大小：432K
• 年卷期：v.85,no.7(April 2, 2013)
• ISSN：1520-6882

文摘

A new approach for the nondestructive reconstruction of stratified systems with constant elemental composition but with varying chemical compounds has been developed. The procedure is based on depth scans with a confocal X-ray fluorescence setup at certain energies near absorption edges. These so-called marker energies, where XAFS signals of the involved chemical compounds differ significantly, can also be used to uncover the chemical composition and its topology. A prominent field of application is homogeneous material that is degraded due to chemical reactions like oxidation or reduction. A procedure for the semiquantitative reconstruction of stratified material by means of depth scans at marker energies is elaborated and validated and a three-dimensional mapping is presented.