title: Study of phenolic profile and antioxidant activity in selected Moravian wines during winemaking process by FT-IR spectroscopy.
abstract: Wine belongs to a family of products where the quality matters. Its quality can be in principle verified using diverse physicochemical approaches, including the determination of various chemical compounds generally accepted as chemical markers of product quality. Example of such applicable compounds is a family derived from phenols. Next to a more classical approach, infrared spectroscopy can play an important role in this game. Here we sought to develop an easy to use, ultra-fast and robust method based on FT-IR with some important advantages including lower sample and solvent consumptions. The tested and evaluated method was consequently applied in a monitoring of changes in a content of total phenolic compounds (TPC) and total antioxidant activity (TAA) during a process of wine-making. It was found out that total amount of phenolic compounds differs both for individual kind of wines, namely red, white and rose, at each processing stage of the production. The content of phenolic compounds of red and white wine increased while an opposite trend was observed in rose wine. TAA values of analysed wines showed difference between individual kind of wine and indicate the same trend like phenolic profile. Antioxidant activity values relate to changes of phenolic content during production process.
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Analytical Chemistry, Faculty of Science, Palacky University Olomouc, 17. listopadu 12, CZ771 46 Olomouc, Czech Republic.
authors.forename: Jana
authors.initials: J
authors.lastname: Preserova
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, 17. listopadu 12, CZ771 46 Olomouc, Czech Republic.
authors.forename: Vaclav
authors.initials: V
authors.lastname: Ranc
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Analytical Chemistry, Faculty of Science, Palacky University Olomouc, 17. listopadu 12, CZ771 46 Olomouc, Czech Republic.
authors.forename: David
authors.initials: D
authors.lastname: Milde
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Department of Analytical Chemistry, Faculty of Science, Palacky University Olomouc, 17. listopadu 12, CZ771 46 Olomouc, Czech Republic.
authors.forename: Vladimira
authors.initials: V
authors.lastname: Kubistova
authors.affiliation: Vino J. Stavek, Za humny 176, CZ691 07 Němčičky, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Stavek
keywords: Antioxidant activity; Chemometrics; FT-IR spectroscopy; Phenolic compounds