The research about analysis of ion Fe2+ with chitin and chitosan yield adsorption by atomic adsorption spectrofotometry (AAS) method has been done. This research to study about Chemical properties of adsorption ion Fe2+ with chitin and chitosan as adsorbent with specified of equilibrium times, optimum cocentration adsorption , adsorption capacity and pH influence 4, 7 and 9 to adsorption capaci…