Alginate - Solubility- and stability properties

6 important questions on Alginate - Solubility- and stability properties

Why is pectin unstable at high pH and alginate stable (both when heated)?

Pectin has (methyl)ester groups that can have beta-elimination, alginate does not.

Are alginic alginate and calcium alginate soluble in water?

No

Why is the pH important in the solubility of alginates?

The charge of the uronic acids depends on the pH.
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Are sodium, - potassium-, and ammonium- alginate soluble in water?

Yes

At what pH values is sodium alginate not stable?

In acidic condition (low pH).

Is alginate stable at low and high pH?

Yes, even when heated, due to the strong glycosidic bonds between uronic acids.

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