SIELC HPLC Guard Column Primesep N 2.1x10mm 5 μm 100 Å

Primesep N is a normal-phase analytical column with embedded acidic groups. Primesep N has embedded acidic groups with a pKa of about 5. Improves retention of basic compounds by cation-exchange mechanism at pH > 5. Separates polar compounds by HILIC mechanism. All mobile phases are LC-MS and preparative chromatography compatible.