Improved precision in As speciation analysis with HERFD-XANES at the As K-edge: the case of As speciation in mine waste.

ABSTRACT: High-energy-resolution fluorescence-detected (HERFD) X-ray absorption near-edge spectroscopy (XANES) is a spectroscopic method that allows for increased spectral feature resolution, and greater selectivity to decrease complex matrix effects compared with conventional XANES. XANES is an ideal tool for speciation of elements in solid-phase environmental samples. Accurate speciation of As in mine waste materials is important for understanding the mobility and toxicity of As in near-surface environments. In this study, linear combination fitting (LCF) was performed on synthetic spectra generated from mixtures of eight measured reference compounds for both HERFD-XANES and transmission-detected XANES to evaluate the improvement in quantitative speciation with HERFD-XANES spectra. The reference c

SUBMITTER: Saurette EM 

PROVIDER: S-EPMC9455218 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature