Which analytical parameter set is routinely monitored in winery QC labs to assess fermentation progress and stability?

• A. Sugar, pH and TA, residual sugar, alcohol, SO2, temperature and clarity
• B. Colour intensity and aroma intensity only
• C. Only pH and TA
• D. Temperature and viscosity only

Answer: (A)

In winery QC, the aim is to track how fermentation is progressing and how stable the wine will be, which requires a broad panel of measurements that covers what yeast is doing, the resulting product, and factors that influence stability. Sugar shows how much fermentable substrate remains, while residual sugar reveals whether fermentation has finished or stalled. pH and TA quantify acidity and buffering, which affect microbial stability and sensory balance. Alcohol confirms the amount produced and the extent of fermentation. SO2 levels are monitored for microbial protection and oxidation control, and temperature is tracked because it governs the rate of fermentation and flavor development. Clarity provides a quick sign of physical stability and processing readiness. The combination of these parameters gives a comprehensive view of both fermentation progress and stability, whereas choices focusing only on sensory attributes or only a couple of metrics do not capture the full picture.