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AOAC
2003.03
Fluoride in Wine: Fluoride Selective Ion Electrode Standard Addition Method
2003 (2023)
First Action
4
AOAC 2023 Online Ch. 28.1.23A
The concentration of fluoride is measured after addition of a buffer, using a fluoride selective ion electrode.The buffer provides a high, constant background ionic strength, complexes iron and aluminum (which would otherwise complex with fluoride), and adjusts the pH to a level that minimizes the formation of an HF·HF 2 complex. Matrix effects are minimized by using standard addition