アルミン酸塩を含む水酸化ナトリウム溶液中の遊離アルカリおよびアルミニウムの電位差滴定
1968 年 17 巻 3 号 p. 355-357
詳細
1968 年 17 巻 3 号 p. 355-357
A rapid and accurate method is described for the determination of free alkali and aluminum in the sodium hydroxide solutions containing aluminate by alkalimetry.
In the proposed method, free alkali is titrated by standard acid solution after triethanolamine is added to mask aluminum ion. After it arrives at the equivalence point for free alkali, potassium fluolide is added to the solution and then the liberated alkali equivalent to aluminum is titrated with the same standard acid solutions.
More than 0.4 meq. of free alkali and 0.22.0 mmol of aluminum can be determined rapidly.
