10-11
b) The
Sample Interval
(potential resolution) is dependent on the
Scan Rate
.
The best potential resolution for the
Scan Rates
(for mV/s) are shown below.
Scan Rate (
ν
)/mV/s
Resolution/m
ν
≤
15753
1
17066
≤
ν
≤
29257
2
34166
≤
ν≤
40960
3
ν
= 51200
4
CV
c) The maximum number of data points that can be collected in one experiment
is 8000. Therefore, a
Sample Interval
of greater than 1 mV may be required
for multisegment experiments. Any such changes are made automatically by
the software.
d) When the
Number of Segments
is 0, one complete potential cycle is
performed. If
Initial E
is between
High E
and
Low E
, start at
Initial E
,
sweep to one switching potential, reverse and sweep to the other switching
potential, reverse and return to the
Initial
E
. If
Initial E
is the same as either
High E
or
Low E
, then
Number of Segments
= 0 is the same as
Number of
Segments
= 2.
e) The maximum
Number of Segments
is determined by the data storage
capacity, and hence depends on the potential range,
Sample Interval
, etc.
Graphics Menu
(
LSV
and
CV
)
Single Graph
displays the current vs. potential plot.
Analysis Menu
(
LSV
and
CV
)
The
Auto
option for
Results Graph
displays the current vs. potential plot,
and the peak potentials and peak currents are listed in the
Main
window for
all the segments scanned. Alternative baselines can be set by the user through
the
Manual
option.
Math Menu
(
LSV
and
CV
)
The derivative voltammogram is sometimes used to measure the peak
potential more accurately, since the sign of the first derivative change at the
peak potential. The convoluted voltammograms (both semi-derivative and
semi-integral) are sometimes reported. The semi-differential voltammogram
has symmetric peaks and better resolution than the standard voltammogram
(see BAS Capsule 275 and Current Separation article 6. The semi-integral is
used to correct for iR drop.
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