Metrohm 797 VA Computrace Manual de usuario descargar pdf (Pagina 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“.

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