136 Understanding Your Agilent ChemStation
6 Peak Identification
Peak Qualifiers
Peak Qualifiers
A component can be detected with more than one signal. Although applicable
to all forms of chromatography using multiple detectors or detectors capable
of producing multiple signals, multisignal detection is most commonly used in
liquid chromatography with multiple wavelength or diode array detectors.
Such detectors are normally set up so that the wavelength closest to the
greatest absorbance (area) is used to define the main peak in the calibration
table. In Figure 31 on page 136 this is Lambda
1
.
The two other wavelengths that were acquired as signals can be used as peak
qualifiers. In the figure these are Lambda
2
and Lambda
3
.
Figure 31 Peak Qualifiers
Peaks of a compound have a constant response ratio over different
wavelengths.
The qualifier peak response is a certain percentage of the main peak response.
Limits which determine the acceptable range for the expected response can be
set in the calibration table when the Identification Details option is selected. If
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