The QNT Editor
Retention Time Interpretation

To determine how the corresponding retention time is interpreted, double-click the Retention Time in the peak table of the QNT Editor. (For information about the editor, see  The QNT Editor). The Retention Time for X dialog box is opened.

• Select Absolute Times [min] (default) to interpret the retention time as usual (time interval between injection and peak maximum).

Instead of this, relative time intervals to any peak in the peak table (reference peak) can be used:

• Select Time distance to Reference peak [min] to indicate the difference to the Reference Peak in minutes.

• Select Time ratio to Reference peak [%] to indicate the difference to the reference peak in % values.

• The corresponding reference peak is displayed in the Reference peak field. Use the arrow to select a different reference peak.

The reference peak is displayed in the peak table with a light blue background. When the reference peak is in the center of the chromatogram, the difference expressed in minutes or percent can assume negative or positive values, or values below or above 100%.

 Tip:

For difference and relative retention times also, relative (time) Windows are interpreted as percentage values of the absolute retention time! Only the retention times of identified peaks are corrected! In the peak table, you can choose between the three options, as required. The retention time column is re-calculated automatically.