advantages and disadvantages of emission spectroscopy

Advantages of Emission Spectroscopy.

advantages and disadvantages of emission spectroscopy

The emission method is extremely important in analysis.
  1. The technique is highly specific.
  2. The method is extremely sensitive. With this method, every metallic element can be detected even if they are present in very low focus (0.0001%)
  3. Even metalloids (Arsenicum, silicon and selenium) have been identified by this technique.
  4. The analysis can be performed either in a solid or liquid state with almost equal convenience.
  5. The technique requires minimum sample preparation, as a sample can be directly introduced into the arc or spark.

  6. The sample requires no preliminary treatment and can be analyzed as received.
  7. Spectra can be taken simultaneously for more than two elements. No separation is required. A little measure of the test (1-10 mg) is sufficient for analysis.
  8. The technique provides results very rapidly. If automated, the time required is just 30 seconds to one minute.
  9. This method has been used for a wide variety of samples like metals, alloys, paints, geological specimens, and forensic material, environmental and biological samples.
  10. The technique permits non-destructive analysis.

Disadvantages of Emission Spectroscopy.

  1. The equipment is costly and wide experience is required for its successful handling and interpretation of spectra.
  2. The recording is done on a photographic plate which sets aside some opportunity to create, print and interpret the result.
  3. Radiation intensities are not always reproducible.
  4. Relative error exceeds 1 to 2 %.
  5. The accuracy and precision are not high.

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