How can I extract cellulose and starch from Sulphated Polysaccharides?

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David Myslabodski

Again not sure you want to isolate or remove the starch. To remove it; use enzymes. To isolate you will need a fractionation protocol.

Do you want to isolate cellulose/starch from seaweeds that contain water-soluble sulfated polysaccharides or do you want to isolate cellulose/starch from a solution containing said polysaccharides?

case one, as already posted, follow cellulose extraction protocols. To obtain starch, you will need to design a "fractionating" extraction protocol.

case two, there should not be cellulose in such a solution, cellulose should stay behind in the un-extracted residue.

Again not sure you want to isolate or remove the starch. To remove it; use enzymes. To isolate; you will need a fractionation protocol.

Good luck!

Nodirali S. Normakhamatov

Fully supporting the suggestions of David Myslabodski, I can add a note that if you mean a extraction of non esterified polysaccharides from sulfated ones, then you can isolate them after precipitating sulfate derivatives in their barium salt form and filtration.