88 Agilent 1260 Infinity DAD and MWD User Manual
4
Using the Detector
Special Settings of the Detector
Peakwidth Settings
1 To change the Peakwidth settings select Setup Detector Signals.
2 In the section Peakwidth (Responsetime) click on the drop-down list.
3 Change the Peakwidth according to your needs.
Do not use peak width shorter than necessary
Do not use 0.025 sec response time (no filtering/high noise and no need (actually
ultra-fast LC doesn't deliver peaks < 0.0025 min / < 0.15 sec)
Peakwidth enables you to select the peak width (response time)
for your analysis. The peak width is defined as the width of a
peak, in minutes, at half the peak height. Set the peak width to
the narrowest expected peak in your chromatogram. The peak
width sets the optimum response time for your detector. The peak
detector ignores any peaks that are considerably narrower, or
wider, than the peak width setting. The response time is the time
between 10% and 90% of the output signal in response to an
input step function. When the All spectrum storage option is
selected, then spectra are acquired continuously depending on
the setting of the peak width. The time specified by the peak
width is used as a factor in the acquisition of spectra. The
acquisition time for one spectrum is slightly less than the peak
width divided by 8, that is the acquisition time is between 0.0125
seconds (80 Hz) and 3.2 seconds.
Figure 29 Peakwidth Setting
Limits: When you set the peak width (in minutes), the
corresponding response time is set automatically and the
appropriate data rate for signal and spectra acquisition is selected
as shown in the table below.
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