Metrohm viva 1.0 (process analysis) - Manual (Page 639)

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5 Method
viva 1.0 (for Process analysis)
￭￭￭￭￭￭￭￭ 627
5.6.7.4.3 Coefficient k(2)
Variable name RS.’Command name’.’Substance name’.CALC2
Description Second-order coefficient of the calibration curve or standard addition curve.
Decimal places 0…3…6
Unit Concentration unit = #g/L #A L ² g⁻² (for Evaluation quantity
= Height)
#C L ² g⁻² (for evaluation quantity
= Area)
Concentration unit = #L/L #A (for Evaluation quantity =
Height)
#C (for Evaluation quantity =
Area)
Concentration unit = #mol/L #A L ² mol⁻² (for Evaluation quan-
tity = Height)
#C L ² mol⁻² (for Evaluation quan-
tity = 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(2) = L
⁻².
5.6.7.4.4 Coefficient k(4)
Variable name RS.’Command name’.’Substance name’.CALC4
Description Fourth-order coefficient of the calibration curve or standard addition curve.
Decimal places 0…3…6
Unit Concentration unit = #g/L #A L ⁴ g⁻⁴ (for Evaluation quantity
= Height)
#C L ⁴ g⁻⁴ (for Evaluation quantity
= Area)
Concentration unit = #L/L #A (for Evaluation quantity =
Height)
#C (for Evaluation quantity =
Area)
Concentration unit = #mol/L #A L ⁴ mol⁻⁴ (for Evaluation quan-
tity = Height)
#C L ⁴ mol⁻⁴ (for Evaluation quan-
tity = 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(4) = L
⁻⁴.