How can I extract tannins from banana?

Question

How can I extract tannins from banana?

Answer 1

Tannins are secondary metabolites, substances not responsible for the growth and development of plants. These are substances mainly for protection.

Tannin is used in leathers, and sometimes as an ink.

It is commonly found in tea, Camelia sinensis. However, I am not sure if bananas have tannin.

Answer 2

Tannins are extracted with an aqueous organic solvent.

70% acetone and 30% water is a more effective extractant than alcoholic solvents.

Acetone inhibits tannin-protein interaction.

http://www.ansci.cornell.edu/plants/toxi...  has details of purification.