Technical data

Understanding Your Agilent ChemStation 133
Peak Identification
6
Absolute Retention/Migration Time
• specific window values for individual components which are set in the
Compound Details dialog box.
The default values for these windows are entered in the Calibration Settings
dialog box. The width on either side of the retention/migration time that
defines the peak matching window is the sum of the absolute and percentage
windows.
A window of 5 % means the peak must have a retention/migration time
between less than 2.5 % and more than 2.5 % of the calibrated
retention/migration time for that peak. For example, a peak with a
retention/migration time of 2.00 in the calibration run must appear between
1.95 and 2.05 minutes in subsequent runs.
For example, an absolute window of 0.20 minutes and a relative window of
10 % gives a retention/migration time window of between 1.80 and 2.20
minutes.
1.80 min = 2.00 min - 0.10 min (0.20 min / 2) - 0.10 min (10 % of 2.00 min).
2.20 min = 200 min + 0.10 min (0.20 min / 2) + 0.10 min (10 % of 2.00 min).