DHA Group Results
In the DHA Group Results tab, you can find results calculated according to hydrocarbon types. The results are automatically recalculated each time you open or change the chromatogram or select different norm or modify its parameters.
Chromatogram window - DHA Group Results
This table displays the results in a special pivot table. The units of the results in the table depend on the units you have selected in the DHA Settings - Norm - Group Results combo-box. You can see the summary results per carbon number or per a group of paraffins. You may see the following warnings:
- Linked calibration was not generated by DHA
The Calibration you have linked to the chromatogram was not created using the DHA Extension. Create it using the n-Paraffins known sample via the Create DHA Calibration… button.
- Norm selected for DHA Method <norm name> and DHA Calibration <norm name> do not match
Different norms are selected in DHA Results and DHA Calibration.
- Unretained Peak Time has to be enabled in Calibration
To correct this behavior, you must open the Calibration Options dialog in the linked Calibration and enable the Retention Indexes use Log. Interpolation with Unretainded Peak option.
- Unretained Peak Time in Chromatogram <number> and DHA Calibration <number> do not match
Your linked DHA Calibration was generated with different Unretained Peak Time than what the current DHA Method contains. Correct it in the DHA Settings or create DHA Calibration again with the requested Unretained Peak Time.
- Unretained Peak Time is non-zero
This is an informational message that appears when the Unretained Peak Time is set to a non-zero value.
- DHA Calibration is not linked
Calibration is not linked. You will not see any results until you link a DHA Calibration.