淋氟尾液碱度在线分析仪的研制  

Development of On-line Analyzer for Alkalinity in Tail Liquid of Leaching Fluorine

作　　者：董彦霞 周丽华[1] 张慧妍[1] 王欣[1] 王扬[1] DONG Yanxia;ZHOU Lihua;ZHANG Huiyan;WANG Xin;WANG Yang(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《铀矿冶》2023年第4期18-23,共6页Uranium Mining and Metallurgy

摘　　要：采用滴定法,以电极测量判断终点,研制了一种测定淋氟尾液中碳酸根和碳酸氢根浓度的在线分析仪,实现了对0.01~1.00 mol/L碱度的测定,测量重复性误差为1.5%,测量精度误差为4.8%,仪器的检测下限为0.04 mol/L。现场测试结果表明,仪器运行稳定,测量精度高,测量数据与现场滴定分析结果基本一致,满足现场分析要求,加标回收率为96.0%~104.0%。An on-line analyzer was developed for the determination of carbonate and hydrogencarbonate concentrations in the tail liquid of a fluorine-leaching agent by titrimetry with the electrode measuring pH as the end point,the chemical principle,hardware composition,determination program and other functions of the instrument were introduced.The alkalinity of 0.01~1.00 mol/L was determined by the instrument.The repeatability error is 1.5%,the accuracy error is 4.8%and the lower detection limit is 0.04 mol/L.The results of field test show that the instrument has good stability and high precision,and the measured data are basically consistent with the on-site titration analysis data,which meets the requirements of on-site analysis.The recovery rate of spiking is between 96.0%and 104.0%.

关 键 词：碱度 碳酸根 碳酸氢根 淋氟尾液 滴定法 在线 

分 类 号：TL21[核科学技术—核燃料循环与材料] TH862[机械工程—仪器科学与技术]