混合介质库仑滴定法测定煤中碳酸盐CO_2含量  

A new technique for determination of carbonate CO_2 in coal using a novel coulometric titration in mixed medium

作　　者：李家铸 曲静 宋拴臣 李兰新 LI Jia-zhu;QU Jing;SONG Shuan-chen;LI Lan-xin(Hebei Energy Mining Testing Center,Xingtai 054022,Chin)

机构地区：[1]河北省煤田地质研究所,河北邢台054022

出　　处：《煤质技术》2018年第4期15-19,共5页Coal Quality Technology

基　　金：2017年度河北省财政专项预算资助项目(343-0401-YQN-GTUU)

摘　　要：简要介绍了煤中碳酸盐矿物的测定意义,基于碳酸盐CO_2的重量测定法在国内外应用的情况,提出可利用混合介质库仑酸碱滴定技术测定煤中碳酸盐CO_2的新方法,并详细说明了其方法原理、仪器结构性能、实验装置、试剂材料、测试步骤和样品的测定结果。通过对苯甲酸标准溶液、碳酸钙试剂样、煤样中碳酸盐CO_2实测数据及库仑滴定法的性能指标分析表明,用该方法测定煤中碳酸盐CO_2的结果准确度和精密度均高,测试速度快,可实现该项目测试的电化学仪器化。The determination meaning of coal carbonate minerals was introduced in this paper,based on using circumstances at home and abroad of carbonate CO2 weight determination method,it was proposed that using coulometric titration in a mixed medium to do the carbonate CO2 determination in coal samples is a new method,the method principle,equipment structure and performance,experimental device,reagents and materials,test procedures and determination result of sample were described.Through the analysis of benzoic acid standard solution,calcium carbonate reagent sample,carbonate CO2,it was shown that using this method to determine the carbonate CO2,the accuracy and precision of the results were good,the testing speed was fast,the test electrochemical instrumentation of this item could be realized.

关 键 词：煤 碳酸盐CO2 库仑滴定法 混合介质 方法原理 测试步骤 性能指标 测定结果 准确度 精密度 

分 类 号：TQ533[化学工程—煤化学工程]