Sulfites are compounds used in winemaking as preservatives and antioxidants to protect wine from oxidation and bacterial spoilage. While naturally occurring in small amounts, additional sulfites are often added during the winemaking process. Some individuals may be sensitive to sulfites, leading to labeling requirements in many countries.
Wine Component
Tartrates are crystalline deposits that can form in wine, composed of potassium bitartrate. Commonly seen on the bottom of corked wine bottles or as crystals in the wine, they are harmless and do not affect the wine’s quality. Tartrate stability can be enhanced through cold stabilization before bottling.
Anthocyanins are natural pigments responsible for the red, purple, and blue hues in many fruits, including grapes, which ultimately contribute to the color of red wine. Beyond coloring, anthocyanins play a critical role in the taste and texture of wine, influencing its tannic structure and aging potential. These pigments, found […]
Aromatic compounds in wine, including esters, terpenes, and thiols, are responsible for the vast array of aromas that wines can exhibit, ranging from fruits and flowers to herbs and spices. These compounds are derived from the grapes themselves, yeast metabolism during fermentation, and aging processes in oak or bottles. The […]
Carbon dioxide (CO2) plays a vital role in winemaking, both as a byproduct of fermentation and in creating sparkling wines. During fermentation, yeast converts sugars into alcohol and CO2. In still wines, most CO2 escapes, but in sparkling wines, CO2 is retained, creating the bubbles characteristic of these wines. CO2 […]
Esters are chemical compounds in wine that form through the reaction between acids and alcohols during fermentation. They are crucial for the wine’s aroma, contributing fruity, floral, and sometimes buttery notes. The specific esters and their concentrations can significantly influence the wine’s overall sensory profile, playing a key role in […]
Flavonoids are a group of natural compounds found in grape skins, seeds, and stems, contributing to the color, bitterness, and astringency of wine. These compounds include anthocyanins, which give red wine its color, and tannins, which affect texture. Flavonoids are also known for their antioxidant properties, contributing to the health […]
Lactic acid in winemaking results from malolactic fermentation, where malic acid in wine is converted to lactic acid by bacteria. This conversion softens the wine’s acidity, adding complexity and creating a smoother, rounder mouthfeel. Lactic acid is also responsible for buttery or creamy flavours in some wines, particularly in oak-aged […]
Phenolics refer to a group of chemical compounds in wine derived from grape skins, seeds, and stems, including tannins, color pigments, and flavour compounds. They influence the color, taste, mouthfeel, and aging potential of wine. The extraction and management of phenolics are crucial aspects of winemaking, affecting the wine’s overall […]
Pyrazines are chemical compounds responsible for the vegetal or herbaceous aromas in some wines, notably those made from Cabernet Sauvignon, Merlot, and Sauvignon Blanc. These aromas can include bell pepper, grass, or green bean, depending on the wine’s concentration of pyrazines. The presence of pyrazines is influenced by grape variety, […]