Sartorius YDK03MS Mode D'emploi page 24

Formulas
Calculation
The density of a solid object is calculated based on the ratio:
ρ : W (a) = ρ (fl) : [W (a) – W (fl)]
Thus:
W (a) · ρ (fl)
ρ =
W (a) – W (fl)
W (a) – W (fl) = G = buoyancy of the sample
The density of a liquid is determined from the buoyancy of the immersed object which
has a defined volume.
G
ρ (fl) =
V
Where:
density of the solid object
ρ
density of the liquid
ρ (fl)
weight of the solid object in air
W (a)
weight of the solid object in liquid
W (fl)
buoyancy of the immersed object
G
volume of the immersed object
V
Corrections
The following must be allowed for when correcting the density determination:
− The air buoyancy experienced by the sample when weighed in air.
Where ρ (a) = 0.0012 g/cm
20°C, pressure 101.325 kPa); which results in:
W (a) · [ρ (fl) – ρ (a)]
ρ =
W (a) – W (fl)
24 Operating Instructions YDK03MS | YDK04MS
= density of air under normal conditions (temperature
3
+ ρ (a)