GCSE Chemistry Unit 3 Revision

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Instrumental Methods

  • Machines can help us to analyse unknown substances.
  • They are useful for medical purposes, police work, environmental analysis, athletics (drug testing), etc.
  • Technological advances have made more advanced analysis possible.
  • Advantages - Can be done by technicians, not only trained chemists like lab tests. More accurate than lab tests. Much faster than lab methods and tests can be automated. 
  • Disadvantages - Very expensive to run, buy and maintain the machines.
  • To identify metals, atomic absorption spectroscopy is used.
  • The patterns of light absorbed by the metals in the sample…

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