Benzalkonium Chloride and Glycol Method

[Christsean]

I am trying to develop a method for either the LC exclusively or the GC exclusively. I have an air sanitizer that has dipropylene glycol, triethylene glycol, and BTC 8358, which is a quat (Benzalkonium Chloride). Can anyone steer me in the right direction for GC columns that will detect a quat and an GC column for detecting glycols. They do not have to be the same column. I use an FID detector. If you know of a good LC column for both I would appreciate that info. I use an UV detector. Thank you.

[Jumpshooter]

Christ:

Those glycols can be readily resolved using a "DB Wax" column (30 m x .32mm x 1 micron film thickness) as they are very polar compounds being adsorbed to the very polar wax phase of the column. You'll see two well-resolved peaks with the lower molec wt glycol eluting first.

The Benzalk.Chlor can be readily quantified using a titration with Sodium Lauryl Sulfate.

[Christsean]

Thank you. I am currently using the Bromphenol blue titration with SLS for the quat and a StabilWax column for the glycols. This works well, but I would like to test the quat on a column if this is even possible.

[Consumer Products Guy]

I responded in the HPLC section.