4. Method
48
< Symbols used in calculation formulas >
Moisture (μg) : Net water amount
Water obtained by subtracting “Drift value x titrating time
and Blank value” from total water titrated (electrolyzed).
FA : Compensation coefficient for calculation results
Data (ug) : Total water content after electrolysis in the titration cell
Drift (ug/s) : Drift level which changes by ambient moisture and carrier gas
permeating into the titration cell
t (s) : Titration time length from start to the end of titration after
sample is discharged. When titration ends by preset time, it
runs for (t（stir）) + (t（wait）) ＋ (t(max)).
Blank (ug) : Blank level. This is the moisture coming in from other source
than sample itself, and must be deducted from titrated water
volume.
Wt1 (g) : The total weight of sample and sampler before sample is
discharged.
The sample actually discharged is ~Wt1 Wt2~.
Wt2 (g) : The total weight of sampler and sample residue after sample is
discharged.
The sample actually discharged is ~Wt1 Wt2~.
Wt0 (g) : The amount of sample discharged into extracting solvent, a
part of which is taken out for measurement
B (g) : Weight of solvent extraction to dissolve a sample, a part of
which is taken out for measurement by Indirect method
A (ppm) : Water concentration of solvent extraction before the sample is
discharged into the solvent in Indirect method.
V1 (mL) : The amount of sample discharged by volume
Dens (g/mL) : Density of sample discharged by volume
V2 (L) : The volume of gas sample
Temp. (qC) : Temperature of gas sample when measured
D : Dilution coefficient in measurement of sample for its bromine
number
K : Unit conversion coefficient
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