Metrohm 746 VA Trace Analyzer - Manual (Page 295)

5.6 Method Specifications
746 VA Trace Analyzer / 747 VA Stand
5-144
Parameter Range; Default value / Meaning
Curve type linear, nonlin; linear
Curve type for standard addition
The measured values obtained in the standard addition can be
evaluated with a linear or a non-linear function (see also section
6.9.4):
linear Straight line of type y = bx
Calculation by weighted linear regression
y: EV Evaluation value (A, W or s)
x: ρ
eff
Effective mass concentration in the
analysis solution
b: Slope Slope of the line
Y.reg Estimated EV value for sample con-
centration ρ
eff,s
Y.reg
Slope
0
0
EV
ρρ
eff eff
std.add., linear
nonlin Curve of type y = bx + cx 4
Calculation by weighted curve matching
y: EV Evaluation value (A, W or s)
x: ρ
eff
Effective mass concentration in the
analysis solution
b: Slope Slope of the line in the linear region
c: Nonlin. Non-linearity factor
Y.reg Estimated EV value for sample con-
centration ρ
eff,s
Slope
Y.reg
0
0
EV
ρρ
eff eff
std.add., nonlin
1 st standard addition
2 nd standard addition
3 rd standard addition
Sample
3 rd standard addition
2 nd standard addition
1 st standard addition
Sample