EDTA滴定联测硅钙钡镁中钙钡镁指示剂的选择  

Selection of Indicator for Simultaneous Determination of Calcium,Barium and Magnesium in Silicon-calcium-barium-magnesium Alloy with EDTA Compleximetry

作　　者：刘建华[1] 戴文杰[1] 常欢[1] 

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2015年第3期55-59,共5页Science & Technology of Baotou Steel

摘　　要：测定铁合金中钙钡镁普遍采用EDTA络合滴定法。通过一次溶样,可以连续测定硅钙钡镁中钙钡镁三种元素。分别测定钙钡合量,钙镁合量,钙含量,再通过差减分别得到钙钡含量。因此寻找到各自变色敏锐的指示剂对于分析结果的准确度至关重要。It is common to determine calcium, barium and magnesium in ferroalloy with EDTA compleximetry, and they could be continuously determined through dissolving once. The content of calcium and barium, calcium and magnesium as well as calcium are determined separately first, then the content of calcium and barium could be obtained separately with subtraction. Thus, it is vital to find the respective indicntor with keen discolour for accuracy of analysis results.

关 键 词：EDTA络合滴定 钙 钡 镁 

分 类 号：X784[环境科学与工程—环境工程]