Hanna Instruments HI 903 - Manual (Page 214)

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TITRATION THEORY
5.1.5 Calculation of water content in External Dissolution Samples
C sample Concentration of Sample (% w/w)
m solvent Mass of Solvent (g)
m sample Mass of Sample (g)
C solution Water Content of Dissoluted Sample (w/w)
C solvent Water Content of Solvent (w/w)
5.1.6 Calculation of water content in External Extraction Samples
C sample Concentration of Sample (% w/w)
m solvent Mass of Solvent (g)
m sample Mass of Sample (g)
C supernatant Water Content of Supernatant (w/w)
C solvent Water Content of Solvent (w/w)
5.1.7 Calculation of water content in Gaseous Samples
The water content of gases is normally reported in units of
µ
g/L or mg/L.
C sample Concentration of Sample (mg/L)
V titrant Volume of Titrant (mL)
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 Titrant Titer (mg/mL)
m sample Mass of Sample (g)
C tartrate Water Content of Tartrate (156.6 mg/g)
V titrant Volume of Titrant (mL)