Abstract: Chitosan film exhibited a high ability of absorbing iodine in aqueous solution and the ability was increased with increase of the deacetylation degree of chitin. The iodine adsorption ability of chitosan film was independent of the thickness of the film. In organic solvents the absorbition ability was larger in polar solvents than in nonpolar solvents.

Key words: chitosan, film, iodine, adsorption