- 作者: 孫炳榕; 周發俊; 葉雀屏
- 作者服務機構: Contribution from the Department of Chemistry, National Taiwan University
- 中文摘要:
In continuation of a series of chelatometric titration of metal ion with gallein indicator, two procedures for the EDTA titration of cobalt and nickel using gallein as indicator were proposed. In one procedure cobalt ion was titrated with standard 0.05M EDTA solution in ammonium chloride buffer by stepwise addition of ammonia to keep the pH at the optimum value of 8. A sharp color change from violet to rode red indicating the end point can be observed. in another procedure nickel ion was titrated with standard 0.05 M EDTA solution at pH 8 to 9 in ammonia-ammonium chloride buffer solution. The end point is indicated by a color change form bluish violet to rose red.
The interference caused by the presence of approximately equal molar concentration of various foreign ions was observed. - 英文摘要: --
- 中文關鍵字: --
- 英文關鍵字: --