Scanning transmission X-ray microscopy (STXM) is capable of performing chemical speciation and quantitative chemical mapping of elements, organic and inorganic compounds, and mineral phases in complex environmental samples at high spatial resolution. In this presentation, spatially-resolved chemical analysis of light elements in soil samples and environmental biological samples will be presented using 2D STXM. In addition, a recent STXM instrumentation development of energy-resolved X-ray fluorescence will be shown to significantly enhance the STXM detection limit in light elements. Finally 3D STXM will be demonstrated to obtain morphological visualization and quantitative chemical imaging of environmental biological samples in 3D. These examples and techniques will provide a broad range of research options in environmental and earth sciences using the advanced STXM techniques.

Spatially-resolved chemical analysis of environmental samples by scanning transmission X-ray microscopy

245th National Meeting (2013)

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