Extract a signal (EIC or SIM) from an MS spectrum

Privileges

• OpenLab CDS: Data Analysis > Do manual chromatogram extraction

• OpenLab CDS: Method Development > Edit chromatogram extraction parameters
  Privileges are configured in the Control Panel.

Prerequisites

• If the project enforces method approval, the method status must be Generic. For details, see Method approval.

1. For EIC extraction (SCAN data):The m/z expansion range is set in the processing method. To change it, open the Processing Method window, and edit the parameters in the Extraction > Chromatogram node.

   The default m/z expansion is Asymmetric from -0.3 to +0.7.

2. In the Injection Tree, select the relevant injection.

3. If there are MS spectra for different signals, show the required signal in the MS Spectrum window (see Select signals).

4. In the MS Spectrum window, right-click the required ion, then select Extract Chromatogram.

   The EIC or SIM is extracted for the selected ion's m/z value. It will be added to the list of signals and can be shown or hidden the same way as other signals. If the extracted signal already exists, it remains unchanged.