惰气熔融-红外光谱法测定^(7)LiF中的氧含量  

Determination of Oxygen Content in ^(7)LiF by Inert Gas Fusing-Infrared Spectroscopy

作　　者：宗国强[1] 王荣荣[1] 崔振华[1] 陆人杰[1] 安华英 张婷[1] 肖吉昌[1,2] ZONG Guoqiang;WANG Rongrong;CUI Zhenhua;LU Renjie;AN Huaying;ZHANG Ting;XIAO Jichang(Key Laboratory of Organic Fluorine Chemistry,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海有机化学研究所有机氟化学重点实验室,上海200032 [2]中国科学院大学,北京100049

出　　处：《中国无机分析化学》2021年第6期103-106,共4页Chinese Journal of Inorganic Analytical Chemistry

基　　金：中国科学院战略性先导科技专项(XDA02010501,XDA02020105,XDA02020106)。

摘　　要：^(7)LiF是制备熔盐堆冷却剂^(7)LiF-BeF_(2)的基础原材料,其杂质含量的多少与熔盐纯度及应用性能直接相关。采用惰气熔融-红外吸收光谱法,建立了熔盐堆用^(7)LiF中杂质氧含量测定的新方法。考察了不同助熔剂和加热功率等条件对^(7)LiF中氧含量的影响,找到了较好的^(7)LiF中氧含量测定方法。在分析功率为2200 W,用银舟作助熔剂,称样量为0.1 g的条件下对^(7)LiF试样进行了测定,氧的相对标准偏差为2.9%,加标回收率为99.9%~107%。结果表明,方法易操作,速度快,能满足^(7)LiF生产过程中的质量控制要求,为第四代先进核能反应堆用^(7)LiF规模化制备提供了有力的技术支持。^(7)LiF is the basic raw material for preparing molten salt coolant^(7)LiF-BeF_(2),and its impurity content is directly related to the purity and application performance of molten salt.A new method for the determination of impurity oxygen content in^(7)LiF for molten salt reactor was developed by inert gas fusinginfrared absorption method.The effects of different fluxes and heating power on oxygen content in^(7)LiF were investigated,and a better method for the determination of oxygen content in^(7)LiF was found.The relative standard deviation of oxygen is 2.9%and the recoveries are 99.9%—107%,under the condition of 2200 W analytical power,silver boat as flux and 0.1 g sample weight.The results show that the method is easy to operate and fast,and can meet the quality control requirements in the production process of^(7)LIF,which provides a strong technical support for the large-scale preparation of^(7)LiF for the fourth generation of advanced nuclear power reactors.

关 键 词：惰气熔融-红外光谱法 ^(7)LiF 氧 熔盐堆冷却剂 核能反应堆 

分 类 号：O657.33[理学—分析化学] TH744.123[理学—化学]