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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
Author(s) -
Ramanjaneyulu Pentapati S.,
Kundu Kshama,
Sharma Manoj K.,
Nayak Sandeep K.
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701018
Subject(s) - ionophore , alkali metal , selectivity , chemistry , detection limit , analytical chemistry (journal) , crown ether , ion exchange , nuclear chemistry , atomic absorption spectroscopy , ion selective electrode , ether , ion , membrane , metal ions in aqueous solution , electrode , chromatography , catalysis , organic chemistry , biochemistry , physics , quantum mechanics
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‐50 W was used to maintain low activity of Cs + in inner filling solution (IFS) to improve the performance. With optimized IFS, Nernstian response (56.3 mV/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.