Green, Cost-Effective Simultaneous Assay of Chloramphenicol, Methylparaben, and Propylparaben in Eye-Drops by Capillary Zone Electrophoresis

Figure 3

Electropherograms at different concentrations and pHs of sodium tetraborate solution (a): 15 mM, pH = 10; (b): 15 mM, pH = 9.3; (c): 15 mM, pH = 8.5; (d): 30 mM, pH = 10; (e): 30 mM, pH = 9.3; (f): 30 mM, pH = 8.5; and (g): 40 mM, pH = 9.3.

(a)

(b)

(c)

(d)

(e)

(f)

(g)