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Sugar measurement

For still and sparkling wines see under sugar content.

The sugar content as a decisive component in the grapes is indicated by means of must weight in KMW (Austria), in Oechsle(Germany) or internationally also in Bé(Baumé), for example in Portugal. In Germany and Austria, so to speak, the sugar content (or theoretically possible alcohol content) in the berries is a criterion for the Prädikatswein grades. The sugar in the grape must is the basis for fermentation, during which a conversion into alcohol and carbon dioxide takes place. Above a certain alcohol content, the yeasts die and end the fermentation. The upper limit of possible alcohol content is about 16 to 18%, or up to about 20% by volume if turbo yeasts are used in fermentation. The associated lower limit of residual sugar in the wine is usually around 0.1 to 0.2 g/l. There is no wine that contains no sugar at all. The phenomenon that the subjective perception of sweetness in wine can differ from the analytical values depending on the amount of other substances is described under the heading sweet.

Zuckergehalt - Weinflaschen und Zucker

Sweetness levels of still wine

According to the EU regulation or, in some cases, the country-specific wine law regulations, it is optional to indicate the designation for a certain content of residual sugar in the wine on the bottle label. However, each country has the right to stipulate this as a compulsory indication in wine law (as is the case in Austria, for example). The terms or quantities for still wines in Germany and Austria are shown in the following table, whereby those relevant to wine law only start from the line "dry". A tolerance limit applies because there may be uncertainties depending on the laboratory and the measuring method. The sugar content may not deviate by more than 1 g/l from the indication on the label:

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