四种双冠醚的铯离子选择电极  

Cesium Ion-selective Electrodes Based on Four Bis-crown Ethers

作　　者：吴国梁[1] 沈彩娣 钱国英[1] 金道森[2] 曾文[2] 

机构地区：[1]中国科学院青海盐湖研究所,西宁810008 [2]中国科学院兰州化学物理研究所

出　　处：《分析化学》1994年第2期162-164,共3页Chinese Journal of Analytical Chemistry

摘　　要：以合成的四种双(苯并-18-冠-6)为中性载体制成了PVC膜铯离子电极,研究了载体结构,电极膜组成和内充液浓度与电极性能的关系,以邻苯二甲酸二辛酯增塑的4′,4″-(邻-亚苯基二氧亚甲基)双(苯并-18-冠-6)铯离子电极的选择性较好,K_(Ca,K)^(Pot)=2.4×10^(-2),20℃时,该电极的线性响应范围为5×10^(-5)～5×10^(-2)mol/L(CsCl),斜率接近理论值。PVC membrane Cs- -selective electrodes based on four bis(benzo-18-crown-6) as neutral carriers were prepared. The relationship between the structure of the bis-crown ethers and performance of these electrodes as well as the effect of the composition of the membrane and the concentration of the internal solution were investigated. The selectivity coefficients of 4'?4'-(o-phenylenedioxymethylene)-bis (benzo-18-crown-16)-Cs- electrode with DOP as plasticing solvent is better than that of the others.K_(cs.k)^(pot) = 2. 4×10-2. The electrode gave a linear response with a near-Nernstian slope within the concentration range of 5 ×10^(-5)-5×10^(-2)mol/L CsCl at 20°C.

关 键 词：铯 离子选择电极 双冠醚 载体 

分 类 号：O657.15[理学—分析化学]