SPE LV columns, CHROMABOND SA, 45 µm, 15 mL/500 mg

Silca gel modified with benzenesulfonic acid, strongly acidic cation exchanger (SCX). Capacity ~ 0.5 meq/g, adsorbent with hydrophobic and π-π interactions (benzene ring), ion exchange of organic compounds from aqueous matrix, elution of interesting compounds with solvent systems, which compensate the ionic and nonpolar interactions, e.g., methanolic HCl.