Chromatography Forum

I am looking for a supplier for HPLC column. Please help me for select best supplier of some column as below:
- USP L21: A rigid, spherical styrene-divinylbenzene copolymer, 5 to 10 μm in diameter.
- UPS L44: A multifunctional support, which consists of a high purity, 60 Å, spherical silica substrate
that has been bonded with a cationic exchanger, sulfonic acid functionality in addition to
a conventional reversed phase C8 functionality.
- USP L46: Polystyrene/divinylbenzene substrate agglomerated with quaternary amine
functionalized latex beads, 10 μm in diameter.
- USP L47: High capacity anion-exchange microporous substrate, fully functionalized with a
trimethylamine group, 8 μm in diameter

Hi,
You may go to "Pharmacopeis USP 34 or 35" -->Chromatographic columnd---->Packins---->L21, L44 where you ane able to find the recommanded manufacturers.
Good luck!

You can login to chromatographic columns through the link and you can find all the information.

http://www.usp.org/usp-nf/new-chromatog ... e-database

Hi,

I just saw your post about selecting some HPLC columns according to the USP codes.

Imtakt USA actually has a novel new multimode stationary phase which may be useful to you. The stationary phase consists of a unique blend of anion, cation, and reverse phase ligands. So the column can separate anion, cationic, and hydrophobic compounds simultaneously. A link to information for this column is below:

http://www.imtaktusa.com/site_media/fil ... family.pdf

If you would like more information about this column, or if you would like to discuss more, please contact me at bverma@imtaktusa.com.

Hope this helps!