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采用连续滴定法测得甘氨酸铝锆中铝和锆的含量。采用EDTA络合滴定的实验方案,先将甘氨酸铝锆固体粉末配制成溶液,并将溶液的pH值调节在0.5～1之间,以二甲酚橙为指示剂,用EDTA滴定测得锆的含量;再将此溶液的pH值调节在5～6之间,然后加入过量的EDTA溶液,让铝离子与EDTA充分络合,最后过量的EDTA用硫酸锌标准溶液进行返滴定,从而测得铝离子的含量。实验证明,该法简便,结果准确。
The content of aluminum and zirconium in aluminum zirconium glycinate was measured by continuous titration. EDTA complexometric titration of the experimental program, the first aluminum zirconium glycinate solution was prepared as a solid solution, and the pH of the solution was adjusted between 0.5 to 1, with xylenol orange as an indicator titration with EDTA measured zirconium Content; and then adjust the pH of the solution between 5 to 6, and then adding an excess of EDTA solution, so that fully complexed with EDTA and aluminum, the final excess of EDTA with zinc sulfate standard solution back titration, and thus measured aluminum Ion content. Experiments show that the method is simple and accurate.