Abstract

This dataset contains spectra showing examines the effects of Cu and Fe on browning in model wine solutions with various ethanol concentrations (12%, 2%, 1%, and 0.5% v/v) and in aqueous solutions. The data were generated to elucidate mechanisms impacting real product scenarios, including low- and no-alcohol wines. Specifically, the model wine solutions were prepared by adding tartaric acid, caffeic acid, and catechin into an aqueous ethanol solution containing transition metals (iron [Fe] and copper [Cu]) along with sulfur dioxide (SO2). The concentrations of caffeic acid and catechin were standardized at 4 mg/L each, with a final pH value of 3.6 for all solutions. The rate of browning was measured at 420 nm wavelenght (A420 nm). Additionally, the absorbance spectrum covers wavelengths from 200 to 800 nm.