5.1.5. CALCULATION OF WATER CONTENT IN EXTERNAL DISSOLUTION SAMPLES
C
Concentration of Sample (% w/w)
sample
m
Mass of Solvent (g)
solvent
C
Water Content of Dissoluted Sample (w/w)
solution
C
Water Content of Solvent (w/w)
solvent
m
Mass of Sample (g)
sample
5.1.6. CALCULATION OF WATER CONTENT IN EXTERNAL EXTRACTION SAMPLES
C
Concentration of Sample (% w/w)
sample
m
Mass of Solvent (g)
solvent
C
Water Content of Dissoluted Sample (w/w)
supernatant
C
Water Content of Solvent (w/w)
solvent
m
Mass of Sample (g)
sample
5.1.7. CALCULATION OF WATER CONTENT IN GASEOUS SAMPLES
The water content of gases is normally reported in units of μg/L or mg/L.
C
Concentration of Sample (mg/mL)
sample
V
Volume of Titrant (mL)
titrant
Titer
Titrant Titer (mg/mL)
Flow Rate
Sample Flow Rate (L/min)
Flow Duration
Sample Extraction Time (min)
To calculate the water content in %w/w the mass of the gas introduced into the titration vessel must be known. This
can be determined by calculations using ideal gas laws or by measuring the mass of the sample container before and
after a titration.
5.1.8. CALCULATION OF TITER (WATER EQUIVALENT OF THE TITRANT) USING SODIUM TARTRATE
DIHYDRATE CONTAINING 15.66% WATER BY MASS
C
Titrant Titer (mg/mL)
titrant
m
Mass of Sample (g)
sample
C
Water Content of Tartrate (156.6 mg/g)
tartrate
V
Volume of Titrant (mL)
titrant
4
4-17