Electrophoresis, Vol.31, No.9, 1517-1520, 2010
Enantioseparation of amino acids and alpha-hydroxy acids on ligand-exchange continuous beds by capillary electrochromatography
A new chiral stationary phase based on continuous bed (CB) technology using L-prolinamide as a chiral selector was prepared. Its ability for enantioseparation of amino acids and a-hydroxy acids by ligand-exchange CEC was compared with that of a CB containing L-4-hydroxyproline as chiral selector. Preparation was done by a one-step in situ copolyermerization procedure using methacrylamide as monomer, vinylsulfonic acid as charge providing agent and piperazine diacrylamide as crosslinker. L-Prolinamide showed marked enantioselective properties for the separation of amino acids and a-hydroxy acids. Furthermore, we show the possibility of simultaneous enantioseparation of amino acids and cc-hydroxy acids using the CB with L-4-hydroxyproline as chiral selector.
Keywords:Capillary electrochromatography;Chiral ligand exchange;L-4-Hydroxyproline;L-Prolinamide;Monolithic phase