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Determination of Gluconic Acid in Wine Using High Pressure Liquid Chromatography with Pulsed Amperometric Detection.

Journal article published in 2009 by R. Larcher, G. Nicolini, T. Román Villegas, D. Bertoldi ORCID, C. Puecher
This paper is available in a repository.
This paper is available in a repository.

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Abstract

The paper establishes a new HPLC method for measurement of the total content of gluconic acid (GA) in wine using a pulsed amperometric detector equipped with a gold electrode cell and an anion exchange column. A NaOH solution was used at a flow rate of 1.5 mL/min as a mobile phase under isocratic conditions. Analysis took 30 minutes. The linearity of the method was shown up to 500 mg/L, with a LOQ of 2.0 mg/L (10σ). Precision (as RSD%) was under 2.5 % in the usual range of GA concentration in natural wines. Accuracy was checked in comparison with the usual enzymatic method.