2005•Chemia AnalitycznaRequires access

Kinetic determination of citric acid in artificial juice

Danijela Kostić, Snežana Mitić, Gordana Miletić

Abstract

A kinetic spectrophotometric method for the determination of citric acid has been proposed. The method is based on the inhibition effect of hydrogen peroxide on the oxidation of C 6 H 5 COONa in the presence of Fe(II)-AA (ascorbic acid) complex, which acts as a catalyst. Relative error range was 2.9-6.5% for citric acid concentration 1.40-14.0 pg mL-'. Under optimum conditions theoretical detection limit was 0.21 μg mL - 1 . The developed method is simple, inexpensive, efficient, and thus can be recommended for the analysis of large number of samples. The proposed method was applied for to the determination of citric acid in artificial juices.

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Available abstract

Key concepts: Citric acid, Chemistry, Ascorbic acid, Hydrogen peroxide, Detection limit, Catalysis, Kinetic energy, Chromatography