Chapter 3 atomic emission spectroscopy

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Chapter 3 atomic emission spectroscopy

  1. 1. C hapter 3 Atomic Emission Spectroscopy <ul><li>3.1. Fundamentals of AES </li></ul><ul><li>3.2. Instrumentation </li></ul><ul><li>3.3. Analytical Methods of AES </li></ul><ul><li>3.4. Control of Analytical Interferences </li></ul>
  2. 2. 3.1. Fundamentals of AES Atomic Emission Processes
  3. 3. 3.2. Instrumentation <ul><li>1. Light source 2. Spectrometer </li></ul><ul><li>3. Detector 4. Readout </li></ul>
  4. 4. <ul><li>Light Source </li></ul>Quantitative Analysis best high highest ICP Quantitative Analysis good highest low Spark Qualitative Analysis good mid mid AC Arc Qualitative Analysis poor low high DC Arc Application. stability Exci. Temp. Eva.Temp. Type
  5. 5. Light Source Progresses
  6. 9. <ul><li>Spectrometer </li></ul><ul><li>⑴ Monochromater Optical-direct Read Spectrometor </li></ul><ul><li>⑵ Polychromater Optical-direct Read Spectrometor </li></ul>
  7. 12. 3. Detector <ul><li>⑴ Spectrograph </li></ul><ul><li>⑵ Photomultiplier Tube </li></ul><ul><li>⑶ Segmented-array Charge-Coupled Detector (SCD) </li></ul>
  8. 14. <ul><li>ICP-AES Instrumentation System </li></ul>
  9. 17. Two-dimensional array produced by the echelle mount
  10. 20. Fig 3-16 Scheme of SCD Detector
  11. 21. 3.3 Analytical Methods of AES <ul><li>1. Qualitative Analysis </li></ul><ul><li>⑴ Standard Iron Spectra Comparison </li></ul><ul><li>⑵ Indicate Element Spectra Comparison </li></ul><ul><li>⑶ Determination of Line Wavelength </li></ul>
  12. 22. 2. Quantitative Analysis <ul><li>Quantitative Formula </li></ul><ul><li>⑴ theoretical Formula of AES </li></ul>(3.1) (3.2) (3.3)
  13. 23. ⑵ Lomakin Formula ⑶Internal Standard Methods ⑷Standard Calibration Methods (3.4) (3.5) (3.6)
  14. 24. 3.4. Analytical Interferences <ul><li>Spectrum Interference </li></ul><ul><li>Background Interference </li></ul><ul><li>Matrix Interference </li></ul>
  15. 25. 1. Spectrum Interference
  16. 26. 2. Background Interference
  17. 28. 3. Matrix Interference
  18. 30. 3.5 Sensitivity and Detection Limit <ul><li>1. Detection limit </li></ul>(3.7)

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