Crown bridged thiacalix[4]arenes as cesium-selective ionophores in solvent polymeric membrane electrodes

被引：28
作者：
Bereczki, R
Csokai, V
Grün, A
Bitter, I
Tóth, K
机构：
[1] Budapest Univ Technol & Econ, Dept Gen & Analyt Chem, Hungarian Acad Sci, Tech Analyt Res Grp, H-1111 Budapest, Hungary
[2] Budapest Univ Technol & Econ, Dept Organ Chem Technol, H-1111 Budapest, Hungary
来源：
ANALYTICA CHIMICA ACTA | 2006年 / 569卷 / 1-2期
关键词：
potentiometric sensor; cesium ion-selective electrode; thiacalix[4]crown-6 ethers;
D O I：
10.1016/j.aca.2006.03.039
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Novel 1,3-alternate thiacalix[4]mono- and biscrown-6 ethers were studied as ionophores in poly(vinyl chloride) membrane electrodes. Their selectivity behavior was characterized with respect to large number of cations, including potential interferents in environmental samples, and the membrane composition was optimized for cesium ion response. Among the ionophores, 1,3-alternate thiacalix[4]mono(crown-6) ether showed, especially high selectivity for cesium over other alkali-metal ions. Transition and heavy metal ions did not interfere seriously with the electrode response, which indicates that the bridging sulfur atoms do not take part in the ion recognition process. The potentiometric cesium responses of all electrodes involved in this study were found close to Nernstian and the detection limits were lower than 10(-7) M. The Cs+/Na+ selectivity of the different ionophore-based sensors and the solvent extraction ability of the ligands were interpreted based on the respective constants of complex formation. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：42 / 49
页数：8
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