Ion-selective electrodes in organic analysis-determination of vanillin by a vanillate-selective electrode

Wing Hong CHAN*, Albert W M LEE, Chuen Ley Foo, Wing Kai Tang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A PVC membrane vanillate-selective electrode has been developed for the indirect determination of vanillin. The vanillate electrode exhibits a Nernstian response in the range 10-1 ×10-3 M vanillate with a slope of 59 mV per concentration decade. The electrode has a reasonably wide working pH range (7.5-10.2), a fast response time (less than 30 s) and is stable for at least a month. For the determination of vanillin, vanillin was first oxidised in situ to vanillic acid, which was then determined by the vanillate-selective electrode. The results obtained with the electrode method agree well with those determined by UV spectroscopy. This methodology could be extended to the determination of other aldehydes.

Original languageEnglish
Pages (from-to)845-848
Number of pages4
JournalThe Analyst
Volume112
Issue number6
DOIs
Publication statusPublished - 1987

Scopus Subject Areas

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

User-Defined Keywords

  • Ion-selective electrode
  • Organic analysis
  • Oxidation in situ
  • Vanillate-selective electrode
  • Vanillin determination

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