Metrohm 746 VA Trace Analyzer - Manual (Page 243)

5.5 Operation
746 VA Trace Analyzer / 747 VA Stand
5-92
Parameter Range; Default value / Meaning
Techn. display only
Calibration technique
Calibration technique selected for the evaluation of the substance
(see sections 5.6.3 and 6.9):
std.add. Standard addition
cal.crv. Calibration curve
int.std. Internal standard
Y.reg/offset display only
Regression value or intercept (variable KY:<subst>)
Depending on the calibration technique selected, the following is
shown under this parameter (see sections 5.6.3 and 6.9):
std.add. Current or area value for the sample in A, W or s cal-
culated from the standard addition curve
cal.crv. Intercept of the calibration curve
int.std. No display
This value can be used in formulae as KY:<subst> ( <subst> =
substance name) for further calculations. It is put out in such cases in
the base units A, W or s without prefix (see section 5.6.4).
Slope display only
Slope or proportionality factor (variable KS:<subst>)
Depending on the calibration technique selected, the following is
shown under this parameter (see sections 5.6.3 and 6.9):
std.add. Slope of the standard addition curve
(in AL/g, WL/g or sL/g)
cal.crv. Slope of the calibration curve (in AL/g, WL/g or sL/g)
int.std. Proportionality factor between analyte and reference
substance (in AL/g, WL/g or sL/g)
This value can be used in formulae as KS:<subst> ( <subst> =
substance name) for further calculations. It is put out in such cases in
the base units AL/g, WL/g or sL/g without prefix (see section 5.6.4).
Nonlin. display only
Non-linearity factor (variable KN:<subst>)
Non-linearity factor of the calibration curve or the standard addition
curve (in [AL/g]
4
, [WL/g]
4
or [sL/g]
4
, see sections 5.6.3 and 6.9).
This value can be used in formulae as KN:<subst> ( <subst> =
substance name) for further calculations. It is put out in such cases in
the base units without prefix (see section 5.6.4).
Mean deviat. display only
Mean deviation of standard addition or calibration curve
(variable KD:<subst>)
Calculated mean deviation of the measured values about the standard
addition or calibration curve in A, W or s.
The size of
Mean deviat. can be used as a measure of the quality of
a standard addition or calibration curve.
This value can be used in formulae as KD:<subst> ( <subst> =
substance name) for further calculations. It is put out in such cases in
the base units A, W or s without prefix (see section 5.6.4).