ISSN:
1572-8838
Keywords:
platinized electrodes
;
redox potential
;
wine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract A reproducible method for measuring the redox potential of wines using platinum electrodes was developed involving a consistent electrode pretreatment and carefully controlled experimental conditions. Reproducibility favoured platinized electrodes (±3mV), over unplatinized electrodes (±6mV), while poisoning was found to have a greater effect on platinized electrodes. However, the dependence of the potential upon the degree of platinization indicated that both platinized and unplatinized electrodes should be used to maximize the information obtained about the redox state of a wine. A linear relationship was observed between the potential and pHof 26 wines tested, particularly on platinized electrodes. The measured potentials are discussed in terms of mixed potential theory and the influence of adsorbates.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018407230924
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