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A considerable number of methods are available, and are based on different physicochemical properties of these molecules. This article aims to clarify the principles of these different methods for determining different families of polyphenols in red wine in order to provide theoretical support to oenological laboratories and private cellar laboratories in their analysis choices.

Keywords: polyphenols, red wine, spectrophotometric method

E-Mail: liming.zeng@changins.ch

Adress: Agroscope, 1260 Changins/Nyon

The introduction of a Climate Reserve for Chasselas vinified in AOC category implies the possibility of harvesting a quantity of grapes whose commercialization in wine would be delayed, until it is approved by the relevant authority. According to simulations carried out at the level of the canton of Vaud (2000–2018), the increase in consumption linked to the release of the Climate Reserve would be between 2 and 10 million liters per Vaud wine region. Over the period analyzed, it is possible to observe a turnover increase for the AOC Vaud wine regions between 1,2% and 3,3% for Chasselas. The Climate Reserve could be a complementary system to the existing production quotas, which do not have a significant influence on the quantities sold. This new tool could make it possible to avoid adopting exceptional and costly measures such as (wine) downgrading (2013–2020), to deal with climatic hazards and plant health problems.

Keywords: Wine economics, wine commercialization, economic simulation, regression analysis, market share

E-Mail: alexandre.mondoux@changins.ch

Adress: Agroscope, 1260 Changins/Nyon