高等学校化学学报 ›› 1981, Vol. 2 ›› Issue (1): 37.

• 论文 • 上一篇    下一篇

交流示波极谱滴定的研究(Ⅳ)——大量镁存在下用EGTA滴定钙

高鸿, 翁筠蓉, 尹常庆   

  1. 南京大学化学系
  • 收稿日期:1980-03-20 出版日期:1981-01-24 发布日期:1981-01-24

INVESTIGATIONS ON OSCILLOPOLAROGRAPHIC TITRATION——IV TITRATION OF Ca IN PRESENCE OF Mg

Kao Hung Weng Yunrong, Yin Changqing   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1980-03-20 Online:1981-01-24 Published:1981-01-24

摘要: 将交流示波极谱滴定应用于大量镁存在下钙的EGTA滴定。Ca:Mg的比例可达1:40,Fe、Ti、Al、Mn、Pb等杂质存在时,不需要另加其它掩蔽剂。此法优点:仪器简单、方法快速、终点明确、准确度好。用于石灰岩矿样分析,得到满意的结果。

Abstract: Application of oscillopolarographic titration to EGTAtitration of Ca in presence of Mg gives satisfactory results, with Ca:Mg = 1:40.Small amounts of Fe、Al、Ti、 Mn and Pb, which are precipitated in the titration cell without filtration give no interference.The end point is sharp.Being rapid and accurate, the method can be used in limestone analysis.

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