Metrohm 797 VA Computrace - Manual (Page 200)

6 Electroplating Bath VA
797 VA Computrace – Software
188
Peak evaluation [ Height, Area, Derivative, Coulometric ; Coulomet-
ric ]
Selection of peak evaluation quantity:
Height
Peak height from baseline to peak maximum.
Area
Peak area between peak curve and calculated
baseline.
Derivative
Difference between positive an negative maximum
of the first derivative of the voltammogram.
Coulometric
Charge transmitted during the peak.
Smooth factor [ 1...6 ; 4 ]
Smoothing power of the Savitzky/Golay smooth-
ing of the baseline (1 = minimum smoothing, 6 =
maximum smoothing) (s
ee Smoothing and differ-
entiation , section 5.8 ).
Eliminate spikes
Eliminates spikes to smooth the signal.
Reverse sweep [ on, off ; off ]
Enable peak evaluation of the reverse sweep of
cyclic sweeps (not available with CPVS).
Endpoint and evaluation criteria
Begin of evaluation Q/Q(0) [ 0…1 ; 1.0]
Only the measuring points between the „Begin of
evaluation“ and the „Evaluation ratio“ are used for
the calculation of the regression (linear, nonlinear
and quadratic).
6.3 Different settings and options with CVS and CPVS
• Deposition and Equilibration (see Pretreatment section 3.4, and
Pretreatment with CVS and CPVS section 6.3)
• “Initial mixing time” instead of “Initial purge time” in the volt-
ammetric settings (see Purging section 3.4, and Initial mixing
time with CVS and CPVS , section 6.3)
• Different Sweep parameters on the
Voltammetric tab of the EDIT
WORKING METHOD PARAMETERS window (see CVS - Cyclic
Voltammetric Stripping section 3.2, and CPVS - Cyclic Pulse
Voltammetric Stripping , section 3.2)
• Different default values for conditioning cycles on the
Voltam-
metric tab of the EDIT WORKING METHOD PARAMETERS win-
dow (see Conditioning cycles with CVS and CPVS , section 6.3)
• Different
Calibration techniques are used (see Working method
specifications window section 5.2, and Calibration techniques
with CVS and CPVS section 6.2)