Alginate - Extraction of alginate

3 important questions on Alginate - Extraction of alginate

What is the source of alginate?

Brown seaweed

How is alginate extracted?

  • Brown seaweed
  • Hot alkaline solution
  • Removal of insoluble material --> solution of sodium alginate
  • Alginate is precipitated from the solution by adding calcium chloride or acid.
  • Alginic acid obtained --> converted back to sodium alginate and dried --> sodium alginate powder

What do the properties of alginate depend on?

The seaweed species from which it is extracted.

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