TY - JOUR
T1 - Cesium ion-selective electrodes based on 1,3-alternate thiacalix[4] biscrown-6,6
AU - Choi, Youngsun
AU - Kim, Hasuck
AU - Lee, Jae Kwang
AU - Lee, Seong Ho
AU - Lim, Heung Bin
AU - Kim, Jong Seung
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2004/11/15
Y1 - 2004/11/15
N2 - Four thiacalix[4]biscrown ethers with 1,3-alternate conformation were examined for the potentiometric responses in poly(vinyl chloride) membrane electrodes. Their potentiometric selectivities toward potassium and cesium ions over other alkali, alkaline earth, and transition metal ions were measured by the fixed interference method (FIM). Among the ionophores, 1,3-alternate thiacalix[4]biscrown-6,6 showed a high selectivity for cesium over potassium ion and so was optimized as a Cs+-selective electrode. The electrode exhibited a linear response with a near Nernstian slope of 57.6 mV per decade in the concentration range of 1.0×10-6 to 3.2×10 -2 M. It was suitable for use in aqueous solution in a wide range of pH 2.5-12.5 and had a fast response time of ca. 5 s. On the basis of 1,3-alternate thiacalix[4]biscrown-6,6, the electrode has a wide linear range and selectivity for cesium ion over potassium ion (log KCs +,K +=-3.7) better than those previously reported with other ionophores.
AB - Four thiacalix[4]biscrown ethers with 1,3-alternate conformation were examined for the potentiometric responses in poly(vinyl chloride) membrane electrodes. Their potentiometric selectivities toward potassium and cesium ions over other alkali, alkaline earth, and transition metal ions were measured by the fixed interference method (FIM). Among the ionophores, 1,3-alternate thiacalix[4]biscrown-6,6 showed a high selectivity for cesium over potassium ion and so was optimized as a Cs+-selective electrode. The electrode exhibited a linear response with a near Nernstian slope of 57.6 mV per decade in the concentration range of 1.0×10-6 to 3.2×10 -2 M. It was suitable for use in aqueous solution in a wide range of pH 2.5-12.5 and had a fast response time of ca. 5 s. On the basis of 1,3-alternate thiacalix[4]biscrown-6,6, the electrode has a wide linear range and selectivity for cesium ion over potassium ion (log KCs +,K +=-3.7) better than those previously reported with other ionophores.
KW - Cesium ion-selective electrode
KW - Potentiometry
KW - Thiacalix[4]biscrown ethers
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U2 - 10.1016/j.talanta.2004.04.015
DO - 10.1016/j.talanta.2004.04.015
M3 - Article
C2 - 18969699
AN - SCOPUS:5144231014
VL - 64
SP - 975
EP - 980
JO - Talanta
JF - Talanta
SN - 0039-9140
IS - 4
ER -