100% over all peaks:
area standardization
This is the integration procedure for which the least
data have to be entered. The chromatograph fills in the
component list itself and calculates the peak areas ac-
cording to
M
i
=
A
i
∑
A
k
∗
100
M
i
=
A
k
=
Concentration of components in percent
Areas of all peaks
The area standardization has been improved in software
version V7.0 in three points:
Unknown peaks
The area standardization no longer overwrites an
existing component list.
If a peak can be assigned to an existing component
line, its result is entered there.
Unknown components area appended to the known
components in the component list. They can be rec-
ognized by a dash instead of a component name.
During the next run, only those components are
overwritten again whose name begins with "-" .
More than 64 peaks
If a chromatogram has more than 64 peaks, the 63
highest peaks are entered into the component list.
The areas of the remaining peaks are added as com-
ponent 64 under the name "- (REST)".
Automatic filling-in of component list
This only functions if you completely delete the
component list prior to the run.
The chromatograph automatically enters a retention
time and a retention window into the component
list for each peak.
The window width is calculated by the chromato-
graph from the retention time and the parameter
"Peak width".
Further default settings are entered by the chroma-
tograph into the component list.
A component list with these default settings can be
easily edited and matched to the desired application.
External standard
A calibration sample with known composition is ana-
lyzed. The concentrations of the components are then
entered together with a dimension into the calibration
list. The chromatograph then calculates the calibration
factors for each peak.
K
i
=
M
i
A
i
M
i
= Concentration of components in the dimension
which you entered in the calibration list
The chromatograph calculates the concentration of in-
dividual components according to
M
i
=
A
i
∗
K
i
M
i
= Concentration of components in the dimension
you entered in the calibration list
Please also refer to Register 5 under
Calibration
.
100% over all components
This integration procedure can be used if all compo-
nents of the sample are measured but their total does
not result in exactly 100 % because of inaccuracies in
the measurement. A quasi area standardization is then
carried out, but calibration factors are taken into con-
sideration which were previously determined according
to the procedure
External standard
.
M
i
=
A
i
∗
K
i
∑
(
A
k
∗
K
k
)
∗
100
M
i
=
A
k
=
K
k
=
Concentration of components in percent
Areas of all peaks
Calibration factors of all peaks
NOTE:
The measuring error is distributed amongst all components.
Abbreviations used in all equations:
A
i
=
K
i
=
F =
Peak area of component
Calibration factor of component
Scaling factor, e.g. dilution factor
Integration
5AUSWERT.CHP, Stand Dezember 22, 1999
13
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