Abstract
The preparation of an improved liquid-membrane periodate-selective electrode is described. The electrode exhibits rapid and near-Nernstian response in the range 2 × 10 −6-10 −2 M. The electrode was used to monitor the course of the tartaric acid-periodate reaction. A potentiometric reaction rate method for the rapid and accurate determination of tartaric acid has been developed. A total of 0.4–120 μmol of tartaric acid has been determined with relative error of about 2.0%. The method has been applied to the determination of tartaric acid in pharmaceutical preparations and to the determination of small amounts of tartaric acid in impure citric acid.
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