EDTA容量法测定碳酸钙主含量方法改进  

Improvement of EDTA Volumetric Method for the Determination of Calcium Carbonate Main Content

作　　者：刘艳 王琳琨 唐继鲜 杨峰 Liu Yan;Wang Linkun;Tang Jixian;Yang Fen(CDGM GLASS CO.,LTD.,Chengdu 610000,Sichuan,China)

机构地区：[1]成都光明光电股份有限公司,四川成都610000

出　　处：《四川化工》2022年第3期49-51,共3页Sichuan Chemical Industry

摘　　要：在碳酸钙中加入定量氯化镁,以EDTA容量法测定钙镁合量。用ICP-AES法测定碳酸钙中镁、锶、钡杂质含量。通过计算得到碳酸钙主含量。该方法的相对标准偏差小于0.03%,回收率在99.94%—100.11%。该方法测定时终点变色明显,测试结果准确。The content of calcium and magnesium was determined by EDTA volumetric method by adding quantitative magnesium chloride into calcium carbonate.The impurity content of Mg,Sr and Ba in calcium carbonate was determined by ICP-AES.The main content of calcium carbonate was obtained by calculation.The relative standard deviation RSD<0.03%,and the addition standard recovery was 99.94%-100.11%.The end point is obvious and the determination result is accurate.

关 键 词：EDTA容量法 碳酸钙 ICP-AES 

分 类 号：TQ132.32[化学工程—无机化工] O655.2[理学—分析化学] TQ171.413[理学—化学]