电位滴定法测定硼化锆中硼含量  

Determination of Boron Content in Zirconium Boride by Potentiometric Titration Method

作　　者：刘雅甜 李甜 栗生辰 胡璇 苗歆悦 Liu Yatian;Li Tian;Li Shengchen;Hu Xuan;Miao Xinyue(Guobiao(Beijing)Testing&Certification Co.,Ltd.,Beijing 101407,China)

机构地区：[1]国标(北京)检验认证有限公司,北京101407

出　　处：《山东化工》2024年第7期125-128,共4页Shandong Chemical Industry

摘　　要：硼化锆是第三代核反应堆的重要燃料,其硼元素含量对材料的性能具有重要影响。目前,对硼化锆中硼元素含量的测定尚未建立分析方法标准。本文建立电位滴定测定硼化锆中硼含量的新方法,探讨了硼化锆的溶解方式、滴定模式、滴定时pH值和甘露醇用量等试验条件,并验证了方法的准确度和精密度。优化后的实验条件为:样品前处理方式为加入3 g氢氧化钠于750℃中熔融20 min,加入2 g甘露醇,采用SET(pH值)+DET滴定方式。加标回收率为99.7%~100.2%,相对标准偏差优于电感耦合等离子体原子发射光谱法。该方法具有良好的准确性和重复率,操作简单、快捷,适用于硼化锆中硼含量的检测。Zirconium boride is an important fuel for the third-generation nuclear reactor,and its boron content has an significant effect on the properties of the material.At present,the standard analysis method has not been established for the determination of boron content in zirconium boride.In this paper,a new method for the determination of boron content in zirconium boride by potentiometric titration method is established.The dissolution method,titration modes pH value and mannitol dosage are investigated.And the accuracy and precision of the potentiometric titration method were verified.The optimized experimental conditions were as follows:the sample pre-treatment method was 3 g sodium hydroxide was melted at 750℃for 20 min,2 g mannitol was added subsequently,SET(pH value)+DET titration method was chose.The recoveries are 99.7%~100.2%,and the relative standard deviation is better than that of inductively coupled plasma atomic emission spectrometry tests.This method has good accuracy,repetition rate,simple and fast operation characteristics,which is suitable for the determination of boron content in zirconium boride.

关 键 词：电位滴定法 硼化锆 硼含量 甘露醇 

分 类 号：O657.1[理学—分析化学]