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Derived variables and calculated process variables (continued)Table E-3:
Derived Variable Description
Calculated process variables
Density at
reference
tempera-
ture
Standard
volume
flow rate
Specific
gravity
Concen-
tration
Net mass
flow rate
Net vol-
ume flow
rate
Mass Concentration
(Specific Gravity)
The percent mass of
solute or of material in
suspension in the total
solution, derived from
specific gravity
✓ ✓ ✓ ✓ ✓
Volume Concentra-
tion (Density)
The percent volume of
solute or of material in
suspension in the total
solution, derived from
reference density
✓ ✓ ✓ ✓
Volume Concentra-
tion (Specific Gravi-
ty)
The percent volume of
solute or of material in
suspension in the total
solution, derived from
specific gravity
✓ ✓ ✓ ✓ ✓
Concentration (Den-
sity)
The mass, volume,
weight, or number of
moles of solute or of
material in suspension
in proportion to the to-
tal solution, derived
from reference density
✓ ✓ ✓
Concentration (Spe-
cific Gravity)
The mass, volume,
weight, or number of
moles of solute or of
material in suspension
in proportion to the to-
tal solution, derived
from specific gravity
✓ ✓ ✓ ✓
Concentration measurement matrices, derived variables, and process variables
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