Metrohm 746 VA Trace Analyzer - Manual (Page 482)

6.8 Height/area calculation
746 VA Trace Analyzer / 747 VA Stand
6-19
6.8 Height/area calculation
With the aid of the calculated baselines, the evaluation quantity EV:<subst> is de-
termined for each substance and displayed as a result. Depending on the meas-
urement mode, the following quantities are possible as evaluation quantities:
Measurement
mode
I.wave I.peak P.peak I.abs I.rel t.peak
DCT (waves) n
DCT (peaks),
DP, SQW, AC1,
l l
CYC (1 ramp)
AC2 l l
PSA n
l adjustable n no other choice possible
These evaluation quantities are calculated as follows:
• I.wave
The wave current I.wave is calculated
from the tangents before and after the
wave (details, see section 6.7.2).
I.wave
• I.peak
The peak height I.peak is determined
from the previously calculated baseline
(details, see section 6.7.3) and the ex-
actly interpolated current height at the
peak maximum.
I.peak
• P.peak
The peak area P.peak is determined
from the previously calculated baseline
(details, see section 6.7.3) by integra-
tion.
With a linear baseline with
Scope =
f.half
and
Scope = r.half
, only the
area up to the peak maximum is taken
as an evaluation quantity.
Scope = whole
Scope = f.half Scope = r.half
• I.abs / I.rel
With AC2 curves, either the absolute or the relative peak height can be cal-
culated. Details are given in section 6.7.4.
• t.peak
With PSA curves, the peak area
t.peak is determined by integration
of the previously calculated base-
line (details, see section 6.7.5).
P.peak
t.peak