THREE NEW TIME EVENTS
PROGRAM PARAMETERS
The time events program contains three new parameters
which control the evaluation:
Switching over the peak width
Drawing baseline from trough to trough
Terminate integration prematurely.
Switching over the peak width
This is an important parameter for matching the
peak recognition to the separating performance of a
column. It controls the bunching of the individual
measured values, and thus the number of measuring
points for a peak.
This parameter is a coarse setting. It should be set
such that the narrow peaks are sufficiently resolved
and the wide, flat peaks are still detected.
Practice has shown that this coarse setting is suffi-
cient for "normal" chromatograms.
The setting in the display
Peak recognition
is the
lowest basic setting for narrow peaks. The peak
width parameter in the time events program must
always be larger than the basic setting.
The time for changing parameters must be selected
such that it occurs at the baseline.
Drawing baseline
from trough to trough
This is a new version of the baseline correction. In
this case, the baseline is always drawn from the
start of the peak to the end of the peak.
This type of baseline correction can be useful for
baselines which change rapidly (pressure surge).
It can only be used with completely separated
peaks.
It must not be used for times overlapping with the
tangent separation.
The trough-to-trough baseline must be switched
ON
and
OFF
in the time events program for the desired
areas.
Terminate integration prematurely
Subsequent processing of the integration was pre-
viously triggered by the end of the run or the com-
mand
REPORT. Subsequent operations are e.g. baseline
correction of last peaks, standardization.
It was previously impossible to access the results of
the run using
BASIC
prior to a
REPORT
command.
The only exception was the integration method
Ex-
ternal standard
because the results of the integra-
tion were already available during the current run.
However, the time always depended somewhat on
the sequence of peaks in the chromatogram.
The new time control command
Terminate integra-
tion
guarantees that all integration operations still
present at this time are executed immediately. All
results of the run are then immediately available in
the component list for further processing.
It is not essential to use this time control command.
The
REPORT
command and the end of the run still
act as previously.
Integration
16
5AUSWERT.CHP, Stand Dezember 22, 1999
To Next Page
Loading...
