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Malic acid is an organic compound with the molecular formula C 4H 6O 5.<br />This service provides a simple and rapid capillary electrophoresis method with direct ultraviolet (UV) detection for the determination of organic acids in beverages. The method includes dilution and filtration as simple sample preparation steps. The electrophoretic separation and detection of oxalic, malic, citric and lactic acids in wines and beers is performed in 8 min.