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In: Chemistry

Describe how you would use IR spectroscopy to determine is contaminated with the starting materials.

Describe how you would use IR spectroscopy to determine is contaminated with the starting materials.

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Expert Solution

Infrared Spectra of a material offer a wealth of bands which are characteristic for certain structural units. Therefore IR spectroscopy is widely used as "fingerprint method" for identifying unknown compounds. A typical IR spectrum contains about 4000 data points and computer software is needed for processing the spectral data. The instrument manufacturers normally provide proprietary software for this purpose. But this is often limited to a restricted number of common applications.

On this basis a method was developed for controlling the purity of chemical substances.

  • if any extra absorption bands are recorded in the IR spectrum of a known compound then it is certain that the compound is not pure.
  • therefore , the compound should be purified further to remove all the impurities.
  • after purification, if IR spectrum is recorded then there will not be any extra absorption bands.
  • thus, IR spectrum is useful in determining the purity of a compound.

queen_honey_blossom answered 2 years ago
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