摘要
研究了二溴茜素紫(DBV)作为钙的络合滴定新指示剂,测定了Ca-DBV络合物的稳定常数。与常用的钙指示剂相比,试剂稳定,变色敏锐,常见金属离子不干扰测定。已用于水、白云石、水泥等样品中钙的测定。
Dibromoalizarin violet (DBV) as a new metallometric indicator for calcium in complexometric titration is investigated. It is estimated that the molar ratio of the complex is 1:1 for Ca(Ⅱ) and DBV, the stability constant is K=2.3×10~5. Compared with other indicator of calcium, the reagent solution is stable, the colour changes sharply and common metal ions do not interfere. The new indicator has been applied to the determination of calcium in water, cement and dolomite.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第6期697-699,共3页
Chinese Journal of Analytical Chemistry
关键词
钙
测定
指示剂
二溴茜素紫
Dibromoalizarin violet, Calcium, Metal indicator
