镁矿石中钙镁的快速连续测定

Fast Continuous Determination of Calcium and Magnesium in Magnesium Ores

摘要: 在一份ｐＨ１０的氨缓冲溶液中，分别用乙二醇二乙醚二胺四乙酸和环己二胺四乙酸连续滴定Ｃａ和Ｍｇ。方法用于镁矿石中Ｃａ和Ｍｇ的测定。结果与标准值和外检结果一致。测定镁矿石中ＣａＯ和ＭｇＯ１２次的ＲＳＤ分别为〈５％和〈０．３０％。

Abstract: A method for continuous titration of calcium and magnesium in ammonia buffer solution at pH=10 with ethylene glycol bis (aminoethyl) ether N,N,N,Ntetraacetic acid (EGTA) and 1,2cyclohexane diamimne tetraacetic acid (CyDTA) was developed. The method has be