Exam Focus
- Recognize oxidation, sulfur, volatile acidity, microbial spoilage, mousiness, geranium taint, solventlike alcohol, and stalled fermentation.
- Distinguish permitted traditional complexity from a fault by intensity, persistence, balance effect, and style context.
- Link each finding to ranked source families and a diagnostic or preventive control without asserting an unseen process.
Core concept
Style context matters, but permission for rustic character is not permission for every defect. Identify intensity, location, persistence, and effect on balance before proposing causes.
Judging and study application
Rank plausible sources and recommend a diagnostic or preventive control. Avoid adding sorbate where incompatible microbial activity could produce geranium character, and investigate sulfur or volatile acidity before masking symptoms.
Why It Matters
- Calling every rustic note acceptable can hide spoilage, while treating all volatile acidity or phenolics as faults can erase valid tradition.
- Sorbate use in the wrong microbial context can create geranium taint, so stability advice must be more specific than 'add preservative.'
Practical Sensory Exercises
Differentiate three microbial clues
Write separate sensory and process notes for volatile acidity, mousiness, and geranium taint. For each, state when it is perceived, one compatible source pathway, and the first control record you would inspect.
Key Terms
- Mousiness
- Microbial fault often perceived after the sample enters the mouth.
- Geranium taint
- Fault associated with sorbate metabolism by certain microbes.
- Volatile acidity
- Aromatic acidity that can become vinegarlike or solventlike.