I Need Assistance with Updating RT Order in Chemstation

[Katz]

I recently updated my GC-MS run method in Agilent Chemstation which produced slight shifts in retention times. As a result, some analytes are no longer in the same order. The problem is that in the Chemstation environmental data analysis software the quant reports show my analytes in order of the previous retention times. The RTs are correct as far as the calibration goes, but I can't figure out how to sort my quant reports by the updated RTs.

If anyone is familiar enough with this software to get me pointed in the right direction I'd very much appreciate it.

[Trishia]

Exactly which version of software are you using? And can you post screenshots of what you mean for clarity? Might help in getting some answers.

[Multidimensional]

'Katz' wrote they changed their GC-MS method "As a result, some analytes are no longer in the same order." -- !!!

*Your peaks now elute at different retention times.... This means that YOU CHANGED THE GC METHOD of ANALYSIS.[/b] When you change the method, you will need to complete the new method development process by running ALL calibration standards, fresh, in replicate to create the new method complete with new calibration table. You can not "edit" a new method to show revised retention times obtained from a different method..

[LALman]

Retention times (RT) do not need to be in order in a Chemstation report. Changing from e.g. a 624 column to a DB-VRX column will result in RT swaps. You can leave the compounds in the same order they are in the table and simply update the RT's. This allows for example putting the Internal Standard above the compounds on the report table for which it is to be the internal standard.

The order of reporting is the order in the compound table, not the retention times.

There is no function in Chemstation that will autosort the compounds by RT. And, if there was you would still need to put the internal standards in front of the compounds that use them; and samewise for the surrogates you can (not recommended) put 4-BFB right after Fluorobenzene and that will be the IS for 4-BFB instead of if you have it after chllorobenzene-d5.

You can manually move compounds by using the insert/delete compound. Its easy to move a compound up or down the list by inserting a new compound and keep the old compound so you can use it as reference to copy and paste all the information. You can even leave it like that and run it to see the same compound and its RT evaluated by different internal standards. For method development that's useful.

Also Multidimensional is correct if you got this table from another method; you will need to run a new calibration to update all the compound intensities correctly.