atomic absorption
Download
Skip this Video
Download Presentation
Atomic Absorption

Loading in 2 Seconds...

play fullscreen
1 / 18

Atomic Absorption - PowerPoint PPT Presentation


  • 241 Views
  • Uploaded on

Atomic Absorption. Terry A. Ring Chemical Engineering University of Utah. E= -13.6 eV Z 2 /n 2. Photo absorption/emision. Atomic Absorption. Lamps are Special. Cathode with receptacle for material Vapor of Material to be analyzed Vapor Excited by plasma Light of particular wavelength.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Atomic Absorption' - meli


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
atomic absorption

Atomic Absorption

Terry A. Ring

Chemical Engineering

University of Utah

lamps are special
Lamps are Special
  • Cathode with receptacle for material
  • Vapor of Material to be analyzed
  • Vapor Excited by plasma
  • Light of particular wavelength
aerosol flow
Aerosol Flow
  • Burner Fuel (& oxidizer) mixed with aerosol of sample
  • Sample asperated into burner
  • Flame ionizes Sample
intensity vs wavelength in aa
Intensity vs Wavelength in AA
  • Light Source
  • Absorbance
  • Monochromatic
  • Detector
analysis
Analysis
  • Absorption of Light
  • Electrons are excited
  • Light Intensity on detector is less
other aa s
Other AA’s
  • Flame
  • Spark
  • Arc
  • Plasma
  • Laser
  • X-ray
atomic emission spectroscopy
Atomic Emission Spectroscopy
  • Flame is used to generated Atoms with excited electrons and ions
  • Light is filtered in spectrometer to give Intensity vs wavelength
spectrometer
Spectrometer
  • Emitted Light
  • Broken into different color components
    • Prism
    • Grating
x ray fluorescence
X-ray Fluorescence
  • Two Steps
    • Absorption of X-ray
      • Elimination of electron for k or L shell
    • Collapse of M shell electron to fill hole
      • Light emission (x-ray)
potential x ray emissions
Potential X-ray Emissions
  • From K shell hole
    • K, K, K,
    • Zeeman Effect - 1, 2, 3
  • From L shell hole
    • L, L, L,
generation of x rays
Generation of X-rays
  • High Voltage Electrons
  • Electron Scattering
  • Electron Absorption
    • X-ray photo ionization
slide16
XRF
  • Energy-dispersive XRF
  • Wavelength-dispersive XRF
xrf detectors
XRF Detectors
  • Energy-dispersive XRF
    • Semiconductor
  • Wavelength dispersive XRF
    • Scintilation Counter
xrf analysis
XRF Analysis
  • Samples can be in any form
    • Solid
    • Powder
    • Liquid
ad