Development of New Cs+ Ion-Selective Electrode with Alkyl-Bridged Calix[4]arene Crown-6 Compounds for the Determination of Cs+ in Nuclear Waste Streams
Development of New Cs+ Ion-Selective Electrode with Alkyl-Bridged Calix[4]arene Crown-6 Compounds for the Determination of Cs+ in Nuclear Waste Streams
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DOI：
10.1002/slct.201701018
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发表时间：
2017-11-13
期刊：
影响因子：
2.1
通讯作者：
Nayak, Sandeep K.
中科院分区：
文献类型：
--
作者：
Ramanjaneyulu, Pentapati S.;Kundu, Kshama;Nayak, Sandeep K.
采用3种1,3环烷基氧基桥接杯[4]芳烃冠6醚化合物（L1：环烷基氧基，L2：环癸氧基，L3：环十四烷基氧基）作为离子载体，制备了一种新型液膜离子选择电极（ISE）。以L3为离子载体时，反应最佳。采用阳离子交换树脂DOWEX-50W维持内填充液（IFS）中Cs+的低活性，以改善其性能。优化后的IFS在Cs+浓度10(-7)~ 10(-2)M范围内观察到nernstia响应（56.3mV/ 10年）。采用金聚苯胺复合材料作为换能器的全固体接触Cs+ ISE也进行了研究。基于IFS的ISE对Cs+有更好的疗效。建立的ISE检测限为3.7x10(-8) M Cs+，响应时间小于20秒。采用分离溶液法测定了Cs+对碱、碱土和过渡金属离子的选择性。在4 ~ 11的pH范围内，ISE对Cs+的反应相当稳定。测定了两种模拟高水平活性废物溶液和加标自来水样品中的Cs+浓度，结果分别与原子吸收光谱（AAS）值和期望值吻合良好。
A new liquid membrane based Ion Selective Electrodes (ISE) for Cs+ employing three 1,3 cycloalkyloxy bridged calix[4]arene crown 6 ether compounds (L1: cyclooctyloxy, L2: cyclodecyloxy, L3: cyclotetradecyloxy) as ionophores were developed. The best response was observed when L3 was used as an ionophore. The cation exchange resin DOWEX-50W was used to maintain low activity of Cs+ in inner filling solution (IFS) to improve the performance. With optimized IFS, Nernstian response (56.3mV/decade of Cs+) over the concentration range 10(-7) to 10(-2) M of Cs+ was observed. Studies were also carried out to develop all solid contact Cs+ ISE employing gold-polyaniline composites as a transducer. Superior response for Cs+ was observed with IFS based ISE. The developed ISE showed detection limit of 3.7x10(-8) M Cs+ with response time less than 20 seconds. Separate solution method was applied to determine selectivity for Cs+ over alkali, alkaline earth and transition metal ions. The response of ISE for Cs+ was fairly constant over the pH range 4-11. The concentration of Cs+ was determined in two simulated high level active waste solutions and spiked tap water samples and results agreed well with atomic absorption spectroscopy (AAS) values and expected values, respectively.