Metrohm viva 1.1 (ProLab) - Manual (Page 1065)

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Glossary
viva 1.1 (for process analysis)
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Electrolyte solution
Basic solution consisting of VMS, suppressor and brightener. It is used in
electroplating bath analysis in the calibration method RC (see Glossary,
page 1056) for the standardization of the curves for leveler determina-
tion.
Evaluation ratio
Preset ratio Q/Q(0) for the determination of the suppressor concentration
using the calibration method DT (see Glossary, page 1050).
Q = currently measured charge
Q(0) = start value, charge Q(0)
Evaluation
Process in which the evaluation quantities and concentrations of the indi-
vidual substances are calculated from raw data.
Intercept solution
Basic solution consisting of VMS and suppressor. It is used in electroplat-
ing bath analysis for determining the intercept value with the LAT (see
Glossary, page 1053) and MLAT (see Glossary, page 1054) calibration
methods.
Intercept value
The intercept value is the charge that is obtained from the measurement
of the intercept solution. It is determined using the LAT (see Glossary,
page 1053) and MLAT (see Glossary, page 1054) calibration methods in
electroplating bath analysis.
LAT (Linear Approximation Technique)
Calibration method based on a standard addition and mainly used for the
determination of brightener in electroplating baths. First, the basic solu-
tion spiked with suppressor, referred to as the intercept solution, is mea-
sured. Then, in a second step, the intercept solution is exchanged for a
(bath) sample spiked with suppressor and the latter is measured. This is
followed by a standard addition with brightener standard solution.
Determination of the intercept value
The intercept solution, which consists of VMS (Virgin Makeup Solution)
and suppressor is measured first. The area of the oxidation peak obtained
from the anodic sweep is evaluated, and the charge is calculated and
saved as intercept value. This value is then subtracted as a background
value from the subsequent measured values.
Sample measurement