Attomap XRF: Applications Gemstone Report

Overview of the Demo

Samples:

Probe Mount Disc#5

Set Up:

  • Moly Target of Multi-target x-ray source with optics optimised for Molybdenum K-alpha edge(17.4KeV)
  • Performed in air, non-vacuum system
  • X-ray beam is 90 degree to the sample surface in flat geometry

Desired Outcomes:

Major element percentage & trace element detection

XRF Heatmap from Various Channels

20um step size/ 0.5 seconds dwell time

Tri-Colour Composite

20um step size/ 0.5 seconds dwell time


Image Processing and Data Analysis

Auto-Segmentation

Integral spectra from particle#23 with BG subtraction and peak fitting (~190 sec statistic)

Sort through all particles to get Y-Ka counts distribution

Spectra from 300-second point analysis on particle #23 ( with better statistics)

Net counts of each element after peak fitting and background subtraction from particle#23

Spectra from 300-second point analysis on particle #14

Net counts of each element after peak fitting and background subtraction from particle#14

Spectra from 300-second point analysis on particle #21

Net counts of each element after peak fitting and background subtraction from particle#21


LLD Calculation on NIST Standard#610

300-second point analysis

Relative Low Limit Detection(LLD) Normalized to 35% of Si in NIST#610 with 300 seconds data collection time

LLD Calculation on NIST Standard#613

300-second point analysis

Relative Low Limit Detection(LLD) Normalised to 35% of Si in NIST#613 with 300 seconds data collection time

Conclusion

  • We successfully map all the particles in Disc#5, and auto-segmented each particle.
  • Quantification can be done on each particle on major elements, which are shown in particle #23, particle#14 and particle #21.
  • Trace level Y is found in particle#23 and particle#14, but not particle #21
  • Relative LLD is calculated with data from NIST Standard 610, plot is shown.


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