Simultaneous concentration enrichment and electrophoretic separation of weak acids on a microchip, using in situ photopolymerized carboxylate-type polyacrylamide gels as the permselective preconcentrator.

Simultaneous concentration enrichment and electrophoretic separation of weak acids on a microchip, using in situ photopolymerized carboxylate-type polyacrylamide gels as the permselective preconcentrator.