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Malolactic Chromatography Testing

In Vintners Corner by Admin0 Comments

Some wine experts claim that the accurate monitoring of Malo-Lactic Fermentation (MLF) is one of the most critical parameters in red wine making but one that is most commonly overlooked. Paper Chromatography is a simple qualitative analytical procedure that has been used for many years in the wine industry to assess progress in MLF.

Potassium Sorbate

In Vintners Corner by Admin0 Comments

Potassium sorbate, a widely used food preservative, is added in small quantities to sweet or semi-sweet wines to prevent further sugar fermentation. It is the only practical way for the home winemaker to guarantee that fermentation will not restart in the bottle.

Yan Calculator

In Vintners Corner by Admin3 Comments

This is the latest version (Oct 2014) of the Excel tool the Willem Wyngaards developed on the basis of the previous article. We call it a YAN calculator, but it is really a nitrogen addition calculator (and it also calculates yeast additions).

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Adding Nitrogen To Fermentations

In Vintners Corner by Admin0 Comments

Yeast requires nitrogen for fermentation. If there is not enough, yeast cells are stressed and produce excess H2S—something that gives fermentations an off-odor. If you want to avoid problems, you must be prepared by adding nitrogen to fermentations.