溶剂萃取石墨炉原子吸收光谱测定盐卤中痕量铷  

Determination of Trace Rubidium in Bittern by Solvent Extraction-Graphite Furnace Atomic Absorption Spectrometry

作　　者：张波[1] 向立人[2] 

机构地区：[1]川北医学院化学教研室,南充637007 [2]四川大学化学系,成都610064

出　　处：《分析化学》1999年第6期661-664,共4页Chinese Journal of Analytical Chemistry

摘　　要：采用石墨炉原子吸收光谱(GFAAS)研究盐卤中铷的原子化行为和机理,建立了热解石墨管、KNO_3-NH_4NO_3基体改进剂、18-冠-6、溴百里香酚蓝、氯仿萃取分离GFAAS测定盐卤铷的方法.用于测定盐卤中痕量铷,特征质量1.1×10^(10)g/0.0044;加标回收率89%～110%;相对标准偏差6.28%(n=13).The atomization behavior and velated mechanism of rubidium wer studied by graphite furnace atomic absorption spectrometry. The Rb was separated by extracting the Eb-18-Cromn-6-bromothymol blue associated complex in chlorotrm and determined by pyrolytic graphite tube using KNO3-NH4NO3 as matrix modifier. The method exhibits high sensitivity and selecivity, it has been used to the determinationof trace Rb in bittern. The characteristic mass is 1.1×10-10 g/0.0044A. The recovery is 89%～110%and the relative standard deviationis 6.28% (n =13).

关 键 词：溶剂萃取 石墨炉 原子吸收光谱 盐卤 铷 测定 

分 类 号：TS312[轻工技术与工程]