Metrohm 797 VA Computrace - Manual (Page 231)

8.6 Analyze Electroplating Bath Solutions
797 VA Computrace – Software
219
“DT Suppressors with calibration curve” (used to
determine the Sample)
"Response Curve Technique"
"RC Record response curve" ( Used to record the re-
sponse curve )
"RC Sample with response curve” ( Used to determine
the sample )
Choose the mode in Electroplating Bath VA
To run Electroplating Bath VA, you can choose between 2 modes:
CVS (Cyclic Voltammetric Stripping) and CPVS (Cyclic Pulse Volt-
ammetric Stripping).
You can select them in the
Mode field of the Determination tab of
the WORKING METHOD SPECIFICATION window.
CVS is the standard mode for Electroplating Bath VA. In case your
bath solution has a high iron content, and you want to do Bright-
ener analysis, choose CPVS.
Choose the Calibration technique in Electroplating Bath VA
Working with the CVS or CPVS, 8 different Calibration techniques
are selectable in the WORKING METHOD SPECIFICATION window:
For method optimization:
"Standard addition plating bath”
This
Calibration technique is used to develop and optimize
methods. It gives information about the response of a single
component of a plating bath
.
For Brightener analysis:
MLAT
"MLAT Standard addition for brighteners”
This
Calibration technique is used to analyze Brighteners. It is the
standard technique to analyze Brighteners in electroplating
baths (Exception: If the difference between Q(“Intercept solu-
tion” + “Bath solution”) and Q(only “Intercept solution”) is too
small to use “MLAT”, try “LAT Standard addition for bright-
eners”).
Typical standard addition scheme for MLAT:
1. Place “Intercept solution” into the sample vessel and press
start. The “Intercept value” Q(intercept) is determined in the
first measurement after the conditioning of the electrode.
2. Add “Bath solution” and measure the value Q(intercept +
bath).