氟离子校正-EDTA络合滴定法测定萤石中碳酸钙含量  

Determination of Calcium Carbonate in Fluorite by Fluoride Correction-EDTA Complexometric Titration

作　　者：莫明凯 Mo Mingkai(Guizhou Province Nonferrous Metals and Nuclear Industry Geological Exploration Bureau Second Corps,Guizhou,550005)

机构地区：[1]贵州省有色金属和核工业地质勘查局二总队,贵州550005

出　　处：《当代化工研究》2022年第14期36-38,共3页Modern Chemical Research

摘　　要：在化学工业当中,萤石是生产氟化氢的主要原料。氟化钙(CaF_(2))是其主要的成分,其次是二氧化硅(SiO_(2))、碳酸钙(CaCO_(3))等。在化学分析工作之中,运用碳酸钙可以被酸所溶解的性质,应用在稀醋酸(CH_(3)COOH)介质当中,对样品进行浸取,通过对CH_(3)COOH溶液当中钙(Ca)的含量进行测定,以此来完成对CaCO_(3)的测定,但在测定的过程当中,由于受到其他一些因素的影响,会使测定的结果受到一定影响。因此,还应该使用二次CH_(3)COOH浸取校正等方式,来得到更精准的结果。基于此,本文综述了氟离子校正-EDTA络合滴定法测定萤石中碳酸钙含量,具有一定的价值。In the chemical industry,fluorite is the main raw material for the production of hydrogen fluoride.Calcium fluoride(CaF_(2))is its main component,followed by silicon dioxide(SiO_(2)),calcium carbonate(CaCO_(3)),etc.In chemical analysis,the property that calcium carbonate can be dissolved by acid is applied to dilute acetic acid(CH_(3)COOH)medium to leach the sample,and the content of calcium(CA)in CH_(3)COOH solution is determined to complete the determination of CaCO_(3).However,in the process of determination,due to the influence of other factors,the determination results will be affected to a certain extent.Therefore,secondary CH_(3)COOH leaching correction and other methods should also be used to obtain more accurate results.Based on this,this paper summarizes the determination of calcium carbonate content in fluorite by fluorine ion correction EDTA complexometric titration,which has a certain value.

关 键 词：氟离子校正 EDTA络合滴定法 萤石 碳酸钙含量 

分 类 号：P575[天文地球—矿物学]