Methods For Determining Specific Gravity/Density - Sartorius YDK01 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:
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:
ρ = specific gravity of the solid
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
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