Metrohm 797 VA Computrace - Manual (Page 189)

6.2 Calibration techniques with CVS and CPVS
797 VA Computrace – Software
177
and CPVS - Cyclic Pulse Voltammetric Stripping
section 3.2)
Substances tab with Calibration technique “DT Record
calibration curve”
The Substances tab of the EDIT WORKING METHOD PARAMETERS
window contains parameters for the definition and recognition of
substances, for the definition of standard solutions, for peak evalu-
ation and results calculation. The parameters displayed depend on
the
Calibration technique selected in the WORKING METHOD SPE-
CIFICATIONS window. With “DT Record calibration curve” follo-
wing parameters have to be defined:
Substance [ 24 characters ; ]
Substance name. For the assignment of a found
peak to this substance the checkbox on the left si-
de of the substance name must be checked.
With CVS:
Peak pos. +/- (V) [ -5...+5 V ; 0 V ]
Position of the peak voltage for the substance and
tolerance for this verification voltage.
With CPVS:
Step potential [ read only ; step 1: 0.2 V ]
Displays the potential values, which are defined in
the window
edit stripping steps .
Bsln .
Parameters for baseline evaluation (details see
Baseline , section 5.2). Click the button to open
the BASELINE window for the selected substance.
Suppressor standard solution
Definition of addition solutions for standard addi-
tion.
No. [ 0...8 ; 0 ]
Number of addition solution used for manual or
automatic addition. For automatic additions, this
number is also the Dosing Device number.
Achtung: Dosino 1..3 refer to Dosinos connected
to the 797 VA Computrace. Dosino 4...7 refer to
Dosinos connected to the 846 Dosing Interface (to
MSB 1...4).
Conc. [ > 0 ; 0 ]
Value for concentration of addition solution.
Unit [ fL/L...mL/L ; mL/L ]
Unit for concentration of addition solution.
Volume (mL) [ > 0.01 mL / var ; 0 mL ]
Addition volume. For entering variable addition
volumes, click the
button to open the EDIT VA-
RIED ADDITION window for the selected substan-
ce (details see Variable addition , section 5.2). In