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/mV
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.
