Determination of zinc(II) and cadmium(II) as their complexes with Xylenol Orange by capillary elecrophoresis using online preconcentration

摘要

A new version of online preconcentration employing the pH-stacking mechanism has been proposed; it has been implemented by the example of a procedure for the capillary electrophoretic determination of trace zinc(II) and cadmium(II) with photometric detection in the visible spectrum region as complexes with Xylenol Orange. The analytical range is 2-400 μg/L for zinc(II) and 1-500 μg/L for cadmium(II).