Barrier technology - Introduction - Sorption isotherms

5 important questions on Barrier technology - Introduction - Sorption isotherms

If you want to know the concentrations valid for a barrier systems, which 3 sorption isotherms do you have?

  1. Phase rich in permeant
  2. Phase poor in permeant
  3. Barrier phase
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When can you apply the Henry model?

For simple liquids; dilute systems
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When can you apply the Langmuir model?

For monolayer adsorption; surfaces and porous systems; some glassy polymers
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When can you apply the multilayer adsorption model?

For polymeric materials and solutions (combination of Henry and Langmuir sorption)
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When can you apply the GAB model?

For multilayer sorption; food matrices
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