Velp Scientifica
– UDK139 Operating Manual
10004762/B5
102
Collect the distillate in the 200 ml graduated flask used to measure the wine quantity.
*set a distillation time to obtain a maximum of 200 ml of distillate. After the distillation,
position the receiving flask in the thermostat for about 15 min. and finally bring up to
volume (200 ml) using distilled water at 20 °C.
4) Density of the Distillate
Measure the density of the distillate through a pycnometer:
1. Weigh the empty pycnometer, clean and dry, with all parts in place (M
pyc
in g)
2. Weigh the pycnometer filled with the distillate at 20 °C (M
dist
in g)
3. Calculate the density of the distillate at 20 °C (D
dist
20°C
) following the formula:
D
dist
20°C
= (M
dist
- M
pyc
) / (V
pyc
x 1000)
V
pyc
(m
3
) is the volume of the empty pycnometer and is calculated as follows:
V
pyc
=(M
pyc
,H
2
O - M
pyc
) / (
ρ
H2O,20°C
x 1000)
Where:
M
pyc,H2O
= pycnometer weight filled with water at 20 °C (g)
ρ
H2O,20°C
= density of the water at 20 °C (0.99823 g/ml)
4. Use the density table of the official method to express the results:
for wine: OIV method - MA - AS312 - 01A
for spirits:
Recommendation n°22 of the International Legal Metrology
Organization suggested by Reg. EC 2870/2000
5. Take care during the entire procedure: avoid fat from fingertips, temperature
changes when holding the pycnometer and air bubbles in it.
Reference:
For wine: Official analytical method OIV - MA - AS312 - 01A - Alcoholic strength by
volume
For spirits: COMMISSION REGULATION (EC) N° 2870/2000
289
