README file
Data Set Title: “Spectrophotometric study of wine color evolution”
Data Set Authors: Arianna Ricci; Cristian Galaz; Giuseppina Paola Parpinello; Andrea Versari 

Data Set Contact Person/s: Arianna Ricci arianna.ricci4@unibo.it 
Data Set License: this data set is distributed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license, https://creativecommons.org/licenses/by/4.0/”]

Publication Year: 2025
Data set Contents
The data set consists of:

 •	1 tabular quantitative file saved in .csv format 
“Wine Color_raw_spectral_data.csv”
 •	1 README file 
“Wine Color_raw_spectral_data.rtf”
Data set Documentation
Abstract
The color evolution of malvidin-3-O-glucoside (Mv-3-O-glc), elicited by caffeic acid (CAF), (+)-catechin (CA), or syringic acid (SI) in model wine solution, was spectrophotometrically monitored over 12 months of storage, considering different malvidin-to-polyphenol molar ratios (1:1 to 1:20) and pH values (2.8–3.6). The dataset belongs to a comprehensive study aimed at modelling the copigmentation onset and its impact on the color of red wines.

Content of the files: 
 •	file [Wine_Color_raw_spectral_data.csv] contains the raw spectral data (UV-Vis spectroscopy) of the experimental mixtures as recorded after 12 months storage. 
 •	file [Wine_Color_raw_spectral_data.rtf] contains a short summary of the experiment. 

File specifics
To create the .csv UTF-8 files, “Microsoft Excel” version: 2509 (build 19231.20156) was used, with the following specifics:
•Character UTF-8

•Field delimiter « ; » (semicolon) 
This upload is supplement to
 
Ricci, A., Galaz-Torres, C., Parpinello, G.P., Demola, M., Spiga, M. and Versari, A., 2025. The Role of Copigmentation in Colour Attributes and Their Evolution in Model Wine: A Thermodynamic and Colorimetric Study. Foods, 14(14), p.2467. doi: 10.3390/foods14142467.

Methodologies 
Model wine buffer (12% ethanol, 5 g/L tartaric acid, pH 3.6) was used to dissolve the standards at the different concentration levels. 
The spectra were recorded using the Agilent Cary UV Workstation Scan Version 5.1.0.1016
Collection Time: 6/12/2024 9:44:05 AM
Operator Name: Arianna Ricci

Parameter List :
 •	Instrument  Cary 60
 •	Instrument Version  2.00
 •	Start (nm)  800.0
 •	Stop (nm)  300.0
 •	X Mode  Nanometers
 •	Y Mode  Abs
 •	UV-Vis Scan Rate (nm/min)  600.000
 •	UV-Vis Data Interval (nm)  1.00
 •	UV-Vis Ave. Time (sec)  0.1000
 •	Beam Mode  Dual Beam
 •	Baseline Correction  Off
 •	Cycle Mode  Off