Metrohm 797 VA Computrace - Manual (Page 207)

6.4 Some Definitions used with CVS and CPVS
797 VA Computrace – Software
195
Contamination potential
The Contamination potential correlates with the concentration of
organic degradation products in the electroplating bath. It is used
with the Calibration techniques LAT Standard addition for bright-
eners and MLAT Standard addition for brighteners (with the modi
CVS and CPVS).
Chloride potential
The Chloride potential correlates with the concentration of chloride
in the electroplating bath. It is used with the Calibration techniques
LAT Standard addition for brighteners and MLAT Standard addition
for brighteners (with the modi CVS and CPVS).
Calibration factor Z
The “Calibration factor” Z is determined with the Calibration tech-
nique “DT Record calibration curve”.
It is used for the Suppressor determination with the
Calibration
technique “DT Suppressors with calibration curve”.
It is calculated from the following equation:
Std VMS
Std Std
V V
c V
Z
+
∗
=
Std
V
Is the volume of Suppressor standard solution at the
“Evaluation ratio”.
Std
c
Is the concentration of Suppressor standard solution.
VMS
V
Is the volume of VMS (Virgin Make-up Solution).
Z is equal to the Suppressor concentration in the measurement cell
at the “Evaluation ratio”.
Suppressor
Any of various components of electroplating bath solutions that
suppresses plating.
Brightener
Any of various components of electroplating bath solutions that in-
creases the deposition during plating.