Metrohm 746 VA Trace Analyzer - Manual (Page 240)

5.5.2 RESULTS
746 VA Trace Analyzer / 747 VA Stand
5-89
Parameter Range; Default value / Meaning
t.mean Mean value of the peak area t.peak for PSAMODE
(in the same unit as for t )
The mean value of the evaluation quantities for a variation V can be
used in formulae as
EV:: ( = substance name;
= variation) for further calculations. It should be noted that this
value is put out in such cases in the base units A, W or s without prefix
(see section 5.6.4).
Std.dev. display only
Standard deviation of evaluation quantities
(variable ES::)
Standard deviation of the individual value of the evaluation quantities
in replications (see section 6.9.3). It is displayed in the same unit as
the mean value
I.mean , P.mean or t.mean and is calculated only if
more than one evaluation quantity is available.
The mean value of standard deviations for a variation V can be used in
formulae as
ES:: ( = substance name; =
variation) for further calculations. It should be noted that this value is
put out in such cases in the base units A, W or s without prefix (see
section 5.6.4).
I.delta,
P.delta,
t.delta display only
Difference in evaluation quantities in variations
(variable ED::)
Difference in the evaluation quantities (or difference in the mean
values in replications) between two successive measurements with
different variation (e.g. standard additions). Analogous to the mean
values of the evaluation quantities, depending on the selection of the
measurement mode and of
Quantity on the "SUBSTANCES" page,
the following is displayed here:
I.delta Difference in the peak currents I.peak or wave currents
I.wave (in the same unit as for I ).
P.delta Difference in the peak areas P.peak
(in the same unit as for P )
t.delta Difference in the peak areas t.peak
(in the same unit as for t )
The difference in the evaluation quantities for a variation V (V > 0) can
be used in formulae as
ED:: ( = substance name;
= variation) for further calculations. It should be noted that this
value is put out in such cases in the base units A, W or s without prefix
(see section 5.6.4).
Comments display only
Comments
Display of comments if any type of error or difficulties appeared in the
determination of the peak or wave evaluation.
The following comments are possible:
approx.peak No result, as the peak height approximated
in the first approximation is less than the limit
value
I.threshold or t.threshold entered
on the "SUBSTANCES" page (see section
5.6.3). If desired, this limit value can be sub-
sequently lowered.