电感耦合等离子体-原子发射光谱法测定钠中的铁、钡和锡  

Determination of Fe、Ba、Sn in Sodium by Inductively Coupled Plasma-atomic Emission Spectrometry

作　　者：黄文杰[1] 米争峰[1] 王密[1] 贾云腾[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《核科学与工程》2014年第3期322-326,共5页Nuclear Science and Engineering

摘　　要：快堆以金属钠作为冷却剂,但金属杂质铁、钡和锡的存在会对其导热性能产生不利影响。为了监控钠的品质,建立了电感耦合等离子体原子发射光谱（ICP AES）测定钠中痕量元素铁、钡和锡的方法。本实验在惰性真空手套箱中称取熔化的钠,取出后以乙醇水体系直接溶解,然后加入共沉淀剂镧溶液,将待测离子铁、钡、锡和基体钠分离,最后用ICP AES进行测定。此法对铁、钡和锡的检测范围是2.0～30 μg/g Na.对高纯钠进行了加标回收实验,铁、钡和锡的平均回收率分别是97.9％、95.8％、93.5％,相对标准偏差分别是1.5％、1.2％、1.8％。本方法已用于净化钠和中国实验快堆一回路钠中的杂质分析,测定结果令人满意。Sodium was used as a coolant in fast reactor. However, a negative influence on the heat trasmittahility of sodium was exerted by metal impurities Fe, Ba and Sn. So the method for determination of trace elements Fe, Ba and Sn by inductively coupled plasma-atomic emission spectrometry （ICP-AES） was developed to monitor the quality of sodium. In this experiment, molten sodium was weighed in vacuum-glove box and dissolved by C2H5OH-H20; then Fe, Ba and Sn were separated from matrix element sodium by co-precipitation reagent-La3＋ solution, being determinated by ICP-AES. The determination range for Fe, Ba and Sn was 2.0-30 ug/g Na. Standard addition and recovery experiments were carried out in pure sodium, the average percentage recoveries of Fe, Ba and Sn were 97.9%.95.8% and 93.5%, and the relative standard deviations （RSD） were 1.5%, 1.2% and 1.8% .The method was used in analysis of impurities in depurative sodium and what＇s in the first circuit of China Experimental Fast Reactor, with satisfactory results.

关 键 词：快堆 钠 金属杂质 电感耦合等离子体-原子发射光谱 共沉淀法 

分 类 号：TL43[核科学技术—核技术及应用]