2003•Analytical LaboratoryRequires access

Determination of citric acid by kinetic-fluorimetric inhibition method

Su Feng, Wei Chang

Abstract

A new kinetic fluorimetric method for the determination of citric acid is proposed. The method is based on the inhibitory effect of citric acid on the oxidation of pyronine Y hydrogen peroxide catalyzed by Fe(Ⅲ) in perchloric acid solution. The linear range of the determination is 0.12～2.4 μg/mL. The detection limit for citric acid is 0.05 μg/mL. This method was used to determine citric acid in carbonated water.

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Available abstract

Key concepts: Citric acid, Chemistry, Hydrogen peroxide, Perchloric acid, Detection limit, Linear range, Inorganic chemistry, Catalysis