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E nergy D ispersive X -ray Fluorescence Spectrometer

EDX-720 Training. E nergy D ispersive X -ray Fluorescence Spectrometer. E nergy D ispersive X -ray Fluorescence Spectrometer. An Atom. Electrons. Nucleus: Protons Neutrons. K. L. M. Orbital or shell. Atoms & Energy. Atoms can absorb and release energy using electrons.

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E nergy D ispersive X -ray Fluorescence Spectrometer

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  1. EDX-720 Training Energy DispersiveX-ray Fluorescence Spectrometer Energy DispersiveX-ray Fluorescence Spectrometer

  2. An Atom Electrons Nucleus: Protons Neutrons K L M Orbital or shell

  3. Atoms & Energy Atoms can absorb and release energy using electrons Atoms absorb energy by promoting an electron to a higher energy orbital Atoms release energy by demoting electrons to a lower energy orbital K L M Energy

  4. What are X-Rays?.......Energy X-Rays Are a Type of Electromagnetic Wave Also Light or Energy

  5. Two types of X-Rays Continuous X-rays vs. Characteristic X-rays Low energy Discrete spectrum Energy out High energy Broad spectrum Energy in

  6. Two types of X-Rays DETECTER Energy Released from the System (Characteristic X-ray) Energy Put into the System (Continuous X-ray) K L M X-ray Tube (Rh)

  7. Characteristic X-Rays Types of transitions

  8. X-Ray Tube and Spectra How X-Rays are generated

  9. SiLi Detector

  10. Filters MoNi Ag Mo Ti EDX-720 includes: Ag, Mo, MoNi, Ti Rh creates it own spectra Sensitivity is low in these areas Introducing a filter reduces the Rh background Increases Sensitivity! ! !

  11. Filters (Cont.)

  12. Filters (Cont.) Without primary filter With primary filter • X-ray tube consist of characteristic X-ray (Rh) and continuous X-rays. • Continuous X-rays are background • Filters decrease background

  13. Intensity vs. Matrix Intensity and Density are inversely related Density affects the analyte’s ability to Fluoresce through the matrix

  14. Measurement Atmosphere • Air, Helium, or Vacuum: • Elements in the range of Na – Sc • Measurement under Helium or Vacuum • Allows analysis of light elements whose x-ray emissions may be absorbed by air, and • Increasing sensitivity for light elements • Solid - Air, Vacuum, or Helium • Liquid - Air, Helium • Powder - Air, Helium

  15. Types of Analyses Two Types of Analyses: Qual/Quant Quantitative Analysis Conditions: FP (Fundamental Parameters Calibration Curve Sample Form: Bulk Films Filter Paper

  16. Hardware Accessories Collimator Exchanger 10 mm 5 mm 3 mm 1 mm CCD Camera X,Y Positioner X Y

  17. Sample Turret • Up to 16 samples • Analysis in air • Analysis under He/Vacuum for lighter elements • Continuous measurement using a sample turret

  18. Sample Films and Containers Film (Covers)

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