Density
The volumetric mass density of a substance is its mass per unit volume. The symbol most often used for density is ρ (sometime d also). Mathematically, density is defined as mass divided by volume.
ρ = m/v
Where,
ρ = density
m= mass
V = volume
Density measurement by DGC (Density Gradient Column)
This method of Density measurement should be performed according to ASTM D1505.