Metrohm viva 1.0 (process analysis) - Manual (Page 638)

5.6 Evaluation subwindow
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viva 1.0 (for Process analysis)
5.6.7.4 Calibration curve results
Standard results of the calibration curve calculation are referred to as cali-
bration curve results. They are created once per substance.
The results of the regression (CALC0 to CALC4 and R2) are calculated as
soon as a sufficient number of calibration points of different concentra-
tions is available for the selected calibration curve type. The variables will
be recalculated once again and their old value will be overwritten as soon
as another calibration point is added.
5.6.7.4.1 Coefficient k(0)
Variable name RS.’Command name’.’Substance name’.CALC0
Description Zero-order coefficient of the calibration curve or standard addition curve.
Decimal places 0…3…6
Unit #A (for Evaluation quantity = Height)
#C (for Evaluation quantity = Area)
Remarks The coefficient k(0) does not depend on the concentration unit of the
standard solution. That is why dependencies exist only with respect to the
measured quantity and the evaluation quantity.
The y axis of the calibration curve is dimensionless because of the fact
that it is standardized in the Dilution Titration (DT) calibration method.
The effective addition volume VEFF is always applied to the x axis. This
means that the unit for the coefficient k(0) = dimensionless.
5.6.7.4.2 Coefficient k(1)
Variable
name RS.’Command name’.’Substance name’.CALC1
Description First-order coefficient of the calibration curve or standard addition curve.
Decimal pla-
ces 0…3…6
Unit Concentration unit = #g/L #A L g ⁻¹ (for Evaluation quantity = Height)
#C L g ⁻¹ (for Evaluation quantity = Area)
Concentration unit = #L/L #A (for Evaluation quantity = Height)
#C (for Evaluation quantity = Area)
Concentration unit = #mol/L #A L mol ⁻¹ (for Evaluation quantity =
Height)
#C L mol ⁻¹ (for Evaluation quantity = Area)
Remarks The y axis of the calibration curve is dimensionless because of the fact that it is standardized in the
Dilution Titration (DT) calibration method. The effective addition volume VEFF is always applied to
the x axis. This means that the unit for the coefficient k(1) = L
⁻¹.