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 language | English |
|---|---|
| Pages (from-to) | 845-848 |
| Number of pages | 4 |
| Journal | Analyst |
| Volume | 112 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 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