Importance of self-absorption correction for HERFD-XAS of concentrated samples

31 January 2025, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

High energy resolution fluorescence detected X-ray absorption spectroscopy (HERFD-XAS) can dramatically reduce core-hole lifetime broadening that smears out spectroscopic detail in conventional X-ray absorption spectroscopy (XAS). This increased spectroscopic resolution can directly translate to increased speciation capabilities in analysis of complex mixtures. However, spectral distortions due to fluorescence self-absorption are inherent in the HERFD-XAS method and can negate improvements. We discuss a method for correcting self-absorption.

Keywords

Self-absorption correction
HERFD-XAS
arsenic
lead

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