carried out at a constant voltage of −5 kV (current about −124 A).
3.1.2. Optimization of the concentration of Na PO
and the pH of
The detection wavelength was set at 236 nm. The sample was introduced into the capillary by hydrodynamic injection at 0.5 psi for 10 s. All electrophoresis runs were performed at a temperature
of 25 ◦ C.