Defining Detection Parameters
Excluding Certain Peaks

Spikes

Sometimes, very narrow peaks (spikes) occur in chromatograms due to, for example, gas bubbles in the HPLC system. In such a case, the problem (= the gas bubbles in the HPLC system) should be solved first, of course. However, to use the chromatogram, identification of these narrow peaks can be suppressed with the QNT Method.

Select the Minimum Width parameter to define the minimum width for the peaks to be integrated. Proceed as when entering the minimum height (see  Reducing the Number of Evaluated Peaks).

Peaks above the Detector Maximum

Sometimes peaks occur whose absorption maximum is above the detector maximum so that integration does not make sense. You can then include these peaks as unidentified peaks into the peak table by using the Maximum Peak Height parameter.

Wide Peaks

If an unusually wide peak occurs in the chromatogram, it may be from a previous sample. Select the Maximum Width parameter to define this peak as being unidentified.