- 作者: 孫炳榕
- 作者服務機構: Contribution from the Department of Chemistry, National Taiwan University
- 中文摘要: A new method for the simultaneous volumetric determination of bismuth and lead in the same solution with the disodium salt of ethylenediaminetetraacetic acid was proposed. By the selective control of the pH to about 1.5, the author found it possible to titrate bismuth alone, and that lead could be subsequently titrated at pH6.0 by adding pyridine as a buffer. Gallein was exclusively employed as indicator in the titration. It underwent an endpoint color change form magenta to pale yellow in the titration of bismuth, and from purplish blue to red in the titration of lead.
- 英文摘要: --
- 中文關鍵字: --
- 英文關鍵字: --