Spectroscopy

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Spectroscopy

• Spectroscopic methods of analysis are based upon
  measurement of the electromagnetic radiation
  produced or absorbed by an analyte.

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Spectroscopy

• Emission Spectroscopy
• Radiation given off by the analyte
• Absorption Spectroscopy
• The analyte absorbs radiation
• Fluorescent Spectroscopy

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Spectroscopy
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Spectroscopy

• Electromagnetic Radiation
• Wave properties
• Conveniently described as a sinusoidal waves that
  have wavelength, frequency, velocity and
  amplitude.
• The wave model fails to account for phenomena
  associated with the absorption and emission of
  radiant energy.

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Spectroscopy
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Spectroscopy

• Electromagnetic Radiation
• Particulate properties
• Electromagnetic radiation can be treated as a
  stream of discrete particles, or wave packets, of
  energy called photons or quanta.

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Spectroscopy

• The energy of a photon depends on the frequency
  of the radiation

• Where h is the Plank constant (6.63 x 10-34 Js)

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Spectroscopy

• The energy of radiation can also be related to
  wavelength and wavenumber

• Note that the wavenumber, in common with
  frequency, is directly proportional to energy.

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Spectroscopy

• Infrared (ir)
• Ultra Violet / Visible (UV/vis)