Metrohm viva 1.1 - Manual (Page 1071)

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Glossary
viva 1.1
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Suppressor
see Suppressor
Suppressor
In electroplating bath analysis, "suppressor" refers to an organic additive
that reduces the plating rate of metals. Because even small quantities of
suppressor can significantly reduce metal deposition, this characteristic
effect can be used to determine the suppressor concentration in an elec-
troplating bath.
Sweep
In voltammetry, "sweep" refers to a single current/potential measurement.
In the case of the CVS measuring mode, the potential is changed at a con-
stant potential sweep rate from the start potential to vertex potential 1,
from there to vertex potential 2 and then back again to the start potential.
The current i is measured as a function of the potential U in this process.
Track
Partial run of a method consisting of commands. The following types
exist: main track, VA track, normal track and special tracks (see Chapter
5.5.1.2, page 399).
VMS (Virgin Makeup Solution)
Basic solution with a composition that should be as identical as possible to
that of the electroplating bath solution to be analyzed, except that it con-
tains no organic additives. It is used in electroplating bath analysis:
￭ In the calibration method DT (see Glossary, page 1050) for the deter-
mination of the start value
￭ In the calibration methods LAT (see Glossary, page 1053) and MLAT
(see Glossary, page 1054) as initial solution for preparing the intercept
solution
￭ In the calibration method RC (see Glossary, page 1056) for preparing
the electrolyte solution
verwendet.
Variation
In voltammetric measurements, all data recorded is stored in a data set.
The result variables belonging to a single voltammogram are unambigu-
ously distinguished by an index X for the variations and another index Y
for the replications (see Glossary, page 1057). Variation refers to a
measurement after modification of the measuring solution, e.g. after a
standard solution has been added.