Chromatography Forum

Hi,

Can anyone please advise where/how I can change the absorbance units in the offline Chemstation from norm to mAu?

I read the Chemstation manual and see that this can be set under "calibration", but I did not set any "calibration". All I remember doing is double clicking on the sequence with runs in progress.

I have no idea how the switch came about. The online Chemstation is still measuring in mAu for the runs in progress.

Thanks in advance!

What are you displaying for the chromatogram? If you have signals overlayed with each in full scale, it has to normalize the chromatograms to display them overlayed in full scale. Try 'All the Same Scale', or display separated. This is under 'Graphics > Signal Options'.

Sorry, I should have asked if this in on the chromatogram graphics, or in the report? My answer was for the graphics. For the report, select 'Calibration > Calibration Settings' and change "Units" to mAU.

Also check 'Reports > Specify Report' and see what you are reporting, Area%, ESTD, ISTD, Norm%, etc.