Cesium ion-selective electrodes based on 1,3-alternate thiacalix[4] biscrown-6,6

Youngsun Choi, Hasuck Kim, Jae Kwang Lee, Seong Ho Lee, Heung Bin Lim, Jong Seung Kim

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)975-980
Number of pages6
JournalTalanta
Volume64
Issue number4
DOIs
Publication statusPublished - 2004 Nov 15
Externally publishedYes

Keywords

  • Cesium ion-selective electrode
  • Potentiometry
  • Thiacalix[4]biscrown ethers

ASJC Scopus subject areas

  • Analytical Chemistry

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