Aldehyde-selective polymeric membrane electrodes based on a calix[4]arene ionophore

Wing Hong CHAN*, Pei Xiang Cai, Xiao Hong Gu

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

21 Citations (Scopus)


A novel type of aldehyde-selective electrode was designed based on the host-guest interaction between p-tert-butylcalix[4]arene ionophore and hydrazone generated in situ from heptanal and Girard's reagent P. The poly(vinyl chloride) membrane electrode contains 3.5-8% m/m of a tetraester derivative of calix[4]arene as the neutral carrier and dioctyl phthalate as the plasticizer. At pH 5.5, the electrode exhibits a Nernstian response in the range 1 × 10-2-9 × 10-7 mol l-1 heptanal with a slope of 67.7 mV per concentration decade. The electrode has a fast response time and a constant Nernstian response after 2 months of continuous measurement. The viability of using the electrode for the micro-determination of heptanal was also demonstrated. The minimum detectable concentration of aldehyde is 3 × 10-5 mol l-1, or, as little as 3.4 μg of heptanal can be determined accurately by the method.

Original languageEnglish
Pages (from-to)1853-1857
Number of pages5
Issue number8
Publication statusPublished - 1994

Scopus Subject Areas

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


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