Metrohm 797 VA Computrace - Manual (Page 206)

6 Electroplating Bath VA
797 VA Computrace – Software
194
Production bath solution
The “Production bath solution” (or “Plating bath solution”) is the
sample solution to be analyzed. It is used in the Electroplating Bath
analysis with the modes CVS and CPVS.
Addition ratio
The “Addition ratio” is a certain Q/Q(0) ratio which defines the
number of additions with the two “dilution titration technique”
Ca-
libration techniques “DT Record calibration curve” and “DT Supp-
ressors with calibration curve” (with the modes CVS and CPVS). It
should normally be around 0.3 and can be defined on the
Substan-
ces tab of the EDIT WORKING METHOD PARAMETERS window.
The “Addition ratio” defines the criteria for the endpoint. After
reaching this point, the standard addition is stopped and the “Cali-
bration factor” is calculated.
Note: The following condition must be fulfilled: „Begin of evalua-
tion“ > “Evaluation ratio” > „Addition ratio“.
Evaluation ratio
The “Evaluation ratio” is a certain Q/Q(0) ratio and defines the
point of evaluation for the calculation of the “Calibration factor” Z.
It is used with the two "dilution titration technique"
Calibration
techniques “DT Record calibration curve” and “DT Suppressors with
calibration curve” (with the modes CVS and CPVS). It should nor-
mally be around 0.5 and can be defined on the
Substances tab of
the EDIT WORKING METHOD PARAMETERS window.
For the regression, all measurement points between 1 and the
measurement point after the evaluation ratio are used.
Note: The following condition must be fulfilled: „Begin of evalua-
tion“ > “Evaluation ratio” > „Addition ratio“.
Begin of evaluation
Only the measuring points between the „Begin of evaluation“ and
the „Evaluation ratio“ are used for the calculation of the regression
(linear, nonlinear and quadratic). It is used with the
Calibration
techniques DT Record calibration curve, DT Suppressors with cali-
bration curve , RC Sample with response curve and RC Record re-
sponse curve (with the modi CVS and CPVS). It should normally be
around 1.0 and can be defined on the
Substances tab of the EDIT
WORKING METHOD PARAMETERS window.
Note: The following condition must be fulfilled: „Begin of evalua-
tion“ > “Evaluation ratio” > „Addition ratio“.