Add Group

Groups in Clarity are used to combine multiple peaks so they can be evaluated together (by summing their areas, heights, etc.). This is useful when related compounds produce separate but closely eluting peaks that should be treated as one component in quantification and reporting.

To use the Add Group command, a peak group must already be defined in the standard chromatogram (for more information see Chromatogram - Peak - Groups).

This command then adds this group of peaks into the calibration. Groups are identified by their corresponding letter.

The Calibration – Add Group command (or the corresponding icon) moves the cursor to the calibration standard graph, where you can select the desired group. You can exit the command at any time by pressing Esc.

Same as with individual compounds, the following parameters can be set:

• On All Signals / On Active Signal: Determines whether the group response is added on all signals or only on the active signal. Group identification is shared across all signals.
• Automatic Calibration: When a new standard chromatogram is opened, Add Group always assigns the group to the first empty calibration level. As long as groups are added from the same chromatogram, they are added to the last active level if they do not already have added responses here. A new calibration level is created if Add Group is used on a group that is already present on the last active level (even within the same chromatogram) or when a different chromatogram is opened.
• Automatic Recalibration: The group is added or updated at the current level, with further adjustments possible later.
• Manual Calibration / Recalibration: The (Re)calibrate Group dialog opens after selecting the group, allowing modification of previously entered data.