By using the solution with ligand of acetic-phosphoric or not and the addition of small volumes acid or base to set the pH, it was possible to determine the roles of metal ions and complexes in adsorption phenomenon.

• 通过使用含醋酸-磷酸配位体溶液与否以及加入很少体积的酸或碱试剂来固定溶液的pH值；可以确定金属离子和金属复合物在吸附现象中所起的角色.