On-line prekoncentrace na rozhraní elektrolytů o různém pH aneb krása kapilární elektroforézy
Klíčová slova:
kapilární elektroforéza, prekoncentrace, fenolické kyselinyAbstrakt
The beauty of capillary electrophoresis is shown on preconcentration of some phenolics. The method is based on the electrokinetic injection of phenolics into a sodium borate electrolyte (pH 9.5) at the pH boundary formed by sodium phosphate (pH 2.5) followed by mobilization and separation by replacing the injection vial with the vial containing micellar environment. This technique allows determination of nanomolar concentrations of phenolics.