Design and characterization of sodium-selective optode membranes based on the lipophilic tetraester of calix[4]arene

Wing Hong CHAN*, Albert W M LEE, Ching Man Lee, Kei Wang Yau, Kemin Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Four types of lipophilic calixarene ionophores have been used in the design of sodium-selective optode membranes. Plasticized poly(vinyl chloride) (PVC) membranes incorporating the tetraester of calix[4]arene and a neutral H +-selective chromo-ionophore (ETH 5294) have proved to be excellent reversible sensing devices for the optical determination of the sodium cation in pH-buffered solutions. At pH 9.0, the absorbance response of the optode shows a good correlation with the theoretically derived formula in the range from 1 × 10-6 to 10-2 mol l-1 sodium ion. Dynamic range, reproducibility, response time and the selectivity of the new optode membranes are discussed.

Original languageEnglish
Pages (from-to)1963-1967
Number of pages5
JournalThe Analyst
Volume120
Issue number7
DOIs
Publication statusPublished - 1995

Scopus Subject Areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

User-Defined Keywords

  • Calixarene ionophore
  • Optode membrane
  • Plasticized poly (vinyl chloride) membrane
  • Sodium determination
  • Spectrophotometry

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