1957 年 77 巻 1 号 p. 33-36
It had been shown earlier that hydroxoaluminum ions are present in various ratios in the solution of basic aluminum chloride (Al2+n(OH)3nCl6) and, in order to confirm this point, paper electrophoresis was carried out and following facts were observed.
1) Electrophoresis carried out with buffer solutions of pH 3-7 indicated that ion migrates better in a solution with larger n at above pH 5, and vice versa in a solution below pH 5.
2) Electrophoresis of the solution with n above 4 is not affected in migration velocity if carried out for a long period at above pH 5 but the solution with n=1 becomes harder to migrate. This fact indicates the presence of aluminum ion with higher basicity in the solution with n above 4, as described in Part II of this series.
3) The migration value of the ion is affected by endosmosis by the electrolyte present.
4) The migration band is elongated but more closely collected in the peak portion. This indicates that various basic aluminum ions are present in equilibrium.
5) Migration distance is affected by temperature and solutions of different basicity show the same tendency.