火焰原子吸收光谱法测定氯化物型卤水中微量铷  

FAAS Determination of Microamounts of Rubidium in Chloride Bittern

作　　者：叶秀深[1] 乃学瑛[1] 李海军[1] 董亚萍[1] 李亚红[1] 李武[1] 

机构地区：[1]中国科学院青海盐湖研究所

出　　处：《理化检验（化学分册）》2008年第8期763-764,767,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：中国科学院2005年度“西部之光”联合学者计划项目“盐湖钾肥生产过程资源损失研究”(科发人教字[2005]404号);中国科学院青海盐湖研究所创新方向性项目“察尔汗盐湖铷化学动态研究”(2005017)支持

摘　　要：对火焰原子吸收光谱法测定氯化物型卤水中微量铷时共存离子，包括钾、钠、钙、镁等的干扰作了试验，并根据试验结果对文献报道的火焰原子吸收光谱法测定简单卤水中铷的条件作了改进。试验表明：当在制作标准曲线时加入与试样中含量相近的上述离子，可抵消其干扰。按此条件，毋需任何预处理，即可直接测定铷。应用此方法分析了两件已知样品中铷量，所得结果与已知值相符。以此样品为基础加入铷标准溶液作回收试验，测得回收率在92%-108%之间。In the FAAS determination of microamounts of rubidium in chloride bittern, iriterferences of coexisting ions, including K^＋ , Na^＋ , Ca^2＋ and Mg^2＋ , were tested, and on the basis of the results obtained, the analytical conditions for FAAS determination of rubidium given in literature were modified. It was found that when definite amounts of the co-existing ions very close to the amounts present in the sample were added to the testing solutions in the preparation of standard curve of rubidium, their interferences were eliminated by compensation. Thus, rebidium in bittern was determined directly without any pretreatment. The proposed method Was applied to determine rubidium in 2 known bittern samples, giving results in consistency with the known values, and giving values of recovery in the range of 92%--108%.

关 键 词：火焰原子吸收光谱法 铷 氯化物型卤水 

分 类 号：O657.31[理学—分析化学]