Column-switching high-performance liquid chromatography-fluorescence detection method for malic acid enantiomers in commercial wines

•Determination of the d- and l-malic acid content in commercial wines.•Malic acid enantiomers detected in wine samples by column-switching HPLC.•Clear chromatogram of d- and l-malic acid peaks in wine samples.•Beneficial for wine-brewing process or quality certification in the wine industry.