1,5-Naphthalenedisulfonic acid is a strong organic acid with a double charge. Multi-charged molecules generally have a tendency to exhibit poor peak shape in HPLC on reverse-phase columns showing significant tailing. The acid can be retained with great peak shape on a Newcrom BH mixed-mode column. The Newcrom line of columns was designed specifically for improved peak shape of multi-charged molecules. The method uses a mobile phase consisting of acetonitrile (ACN), water and ammonium formate buffer, making the method MS-compatible. UV detection at 260nm can also be used.
|Newcrom BH, 3.2×100 mm, 5 µm, 100A
|MeCN/H2O – 50/50%
|Ammonium Formate – 100 mM, pH 3.0
|UV 285 nm
|Class of Compounds
The Newcrom columns are a family of reverse-phase-based columns. Newcrom A, AH, B, and BH are all mixed-mode columns with either positive or negative ion-pairing groups attached to either short (25 Å) or long (100 Å) ligand chains. Newcrom R1 is a special reverse-phase column with low silanol activity.Select options