Methods For Determining Specific Gravity/Density - Sartorius YDK03 Betriebsanleitung

Methods for Determining Specific Gravity/Density

The Archimedean principle is applied for
determining the specific gravity of a solid
with this measuring device:
A solid immersed in a liquid is subjected to
the force of buoyancy� The value of this
force is the same as that of the weight of
the liquid displaced by the volume of the
solid�
With a hydrostatic balance which enables
you to weigh a solid in air as well as in
water, it is possible to:
determine the specific gravity of a solid if
the density of the liquid causing buoyancy
is known:
10 10
W (a) · ρ (fl)
ρ =
W (a) – W (fl)
or
determine the density of a liquid if the
volume of the immersed solid is known:
G
ρ (fl) = ———
V
where:
= specific gravity of the solid
ρ
ρ (fl) = density of the liquid
W (a) = weight of the solid in air
W (fl) = weight of the solid in liquid
G = buoyancy of the immersed solid
V = volume of the solid