火焰原子吸收法测定硝酸钍中微量钾和钠  

Determination of Potassium and Sodium in Thorium Nitrate by Flame Atomic Absorption Spectrophotometry

作　　者：李晓红[1] 王春叶[1] 郭国龙[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《湿法冶金》2015年第3期256-258,共3页Hydrometallurgy of China

摘　　要：硝酸钍样品经水溶解后,在酸性介质中加入氯化铯消除电离干扰,采用火焰原子吸收法测定钾、钠。结果表明:方法检出限为0.020mg/L(钾)和0.004mg/L(钠);钾回收率为102.5%,测定结果的相对标准偏差为3.0%(n=6);钠回收率为97.0%,测定结果的相对标准偏差为2.5%(n=6)。The thorium nitrate was dissolved in water .In acidic medium ,eliminating the disturbance of ionization by adding cesium chloride ,potassium and sodium in the thorium nitrate solution were determined by flame atomic absorption spectrometry .The results show that the detection limit of potassium and sodium are 0 .020 mg/L and 0 .004 mg/L ,respectively .The recovery rate and RSD of potassium are 102 .5% and 3% （n=6） ,the recovery rate and RSD of sodium are 97% and 2 .5% （n=6） .

关 键 词：火焰原子吸收法 硝酸钍 钾 钠 测定 

分 类 号：O657.31[理学—分析化学] TQ133.4[理学—化学]