The effect of achiral calixarenes on chiral separation of propranolol-HCl and brompheniramine maleate in capillary electrophoresis using cyclodextrin as chiral selector

In this study we have examined the effect of achiral water soluble p-sulfonatocalixarenes (SCX[n]) on chiral separation propranolol-HCl and brompheniramine maleate. Several cyclodextrins (CDs) and cyclodextrin derivatives were examined as chiral selectors applying complete filling technique (CFT) accompanied with the partial filling technique PFT of (SCX[n]) as achiral modifier. Only with hydroxypropyl-β-cyclodextrin (HP-β-CD) chiral separation could be achieved. The effect of the organic modifier on these chiral separations was examined. The results indicate that at pH 4.65, the use of HP-β-CD (CFT) alone could not initiate chiral separations of both analytes and these chiral separations could be induced using HP-β-CD (CFT) followed by SCX[n]/HP-β-CD (PFT).