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Updated: May 4, 2026

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
Published on: June 19, 2018
X-ray microanalysis in the scanning electron microscope
Godfried M Roomans1, Anca Dragomir
1School of Health and Medical Sciences, Örebro University, Örebro, Sweden.
Scanning electron microscopy with X-ray microanalysis identifies chemical elements in specimens. This technique offers high sensitivity for elemental detection and detailed spatial resolution, crucial for biological sample analysis.
Area of Science:
- Materials Science
- Analytical Chemistry
- Biophysics
Background:
- X-ray microanalysis using scanning electron microscopy (SEM) is a powerful technique for elemental determination.
- It enables the analysis of bulk or semi-thick specimens with high sensitivity.
Purpose of the Study:
- To detail protocols for X-ray microanalysis of various specimen types.
- To cover qualitative and quantitative analysis aspects, including limitations.
Main Methods:
- Specimen preparation for frozen-hydrated and freeze-dried samples.
- Analysis of small fluid volumes and cell cultures using SEM X-ray microanalysis.
Main Results:
- Detection limits for elements are in the mmol/kg or parts per million range.
- Smallest detectable amounts are as low as 10(-18) g.
- Spatial resolution is dependent on specimen thickness.
Conclusions:
- X-ray microanalysis is effective for elemental determination in diverse samples.
- Careful protocols are necessary for biological specimens to prevent ion loss.
- The technique provides valuable insights into elemental composition with defined limitations.
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