摘要
对EDTA测定Ca2+的不同方法进行了实验比较,并从溶液配制、所用指示剂、氢氧化钠加入量等方面进行了深入讨论,完善和优化了EDTA测定Ca2+的实验测定方法。该法适用于锂钙质量比≤1的天然水、地下水和卤水样品中钙的容量法测定。
The determination methods of calcium by EDTA titration were compared experimentally. The effects of the preparation of standard solution, indicator used and the amount of alkali on added the analytical result were discussed, and then the modified method for Ca^2＋ determination by EDTA titration is proposed. However, the procedure modified has the characters of traditional, accuracy with an error ≤0.3% for the samples of natural waters, underground waters and brines while the mass ratio of lithium and calcium was less than 1.
出处
《广东微量元素科学》
CAS
2007年第1期56-59,共4页
Trace Elements Science
基金
中国科学院"百人计划"项目(0560051057)
关键词
容量法
EDTA
钙
钙指示剂
titration
EDTA
calcium ion
calcium indicator
