Enantioselective nano liquid chromatographic separation of racemic pharmaceuticals: a facile one-pot <em>in situ</em> preparation of lipase-based polymer monoliths in capillary format — ASN Events

Enantioselective nano liquid chromatographic separation of racemic pharmaceuticals: a facile one-pot in situ preparation of lipase-based polymer monoliths in capillary format (#213)

Marwa Ahmed 1 , Ashraf Ghanem 1
  1. University of Canberra, Bruce, ACT, Australia

New affinity monolithic capillary columns with 150 um internal diameter were prepared in situ fused glass capillary via either immobilization or encapsulation of Candida antarctica lipase B (CALB) on or within polymer monoliths, respectively. The prepared capillary columns (ID 150 um) were investigated for the enantioselective nano liquid chromatographic separation of a set of different classes of racemic pharmaceuticals namely α- and β-blockers, antiinflammatory drugs, antifungal drugs, dopamine antagonists, norepinephrine-dopamine reuptake inhibitors, catecholamines,  sedative hypnotics, diuretics, antihistaminics, anticancer drugs and antiarrhythmic drugs. Run-to-run repeatability was quite satisfactory. The encapsulated lipase-based capillary monolith showed better enantioselective separations of most of the investigated compounds. Baseline separation was achieved for alprenolol, atenolol, bromoglutithimide, carbuterol, chloropheneramine, cizolertine carbinol, 4-hydroxy-3-methoxymandelic acid, desmethylcizolertine, nomifensine, normetanephrine and sulconazole under reversed phase chromatographic conditions. A speculation about the understanding of the chiral recognition mechanism of lipase-based monoliths toward the investigated pharmaceuticals is suggested.