Table 2.
Statistical analysis of calibration sample sets, i.e., data ranges, means and standard deviations (SD) and coefficients of variation (CV).
| Parameter | N | Range | Mean | SD | CV (%) |
|---|---|---|---|---|---|
| Total acidity (g acetic acid/100 mL vinegar) | 70 | 4.65–15.75 | 9.44 | 2.14 | 22.70 |
| Fixed acidity (g acetic acid/100 mL vinegar) | 70 | 0.01–0.53 | 0.26 | 0.09 | 34.62 |
| Volatile acidity (g acetic acid/100 mL vinegar) | 70 | 4.39–14.81 | 9.19 | 2.10 | 22.87 |
| pH | 70 | 2.49–3.33 | 2.82 | 0.15 | 5.15 |
| Dry extract (g/L and percentage point of acetic acid) | 70 | 0.72–6.71 | 2.36 | 1.15 | 48.81 |
| Ash (g/L) | 70 | 1.40–8.25 | 3.32 | 1.42 | 42.68 |
| Acetoin (mg/L) | 70 | 144.75–2057.17 | 498.51 | 336.15 | 67.43 |
| Methanol (mg/L) | 70 | 12.18–122.74 | 49.85 | 21.28 | 42.69 |
| Total polyphenols (ppm gallic acid) | 70 | 73.39–801.05 | 344.29 | 141.08 | 40.98 |
| Intensity | 70 | 0.03–9.44 | 1.53 | 1.89 | 123.73 |
| Tonality | 70 | 0.10–4.53 | 2.56 | 1.30 | 50.88 |
| Alcohol content (% vol.) | 41 | 0.22–4.70 | 1.07 | 0.99 | 92.04 |