Direct Separation and Determination of Cd2+, Cue+, Nit+ and Zn2+ in Aqueous Solution by Capillary Electrophoresis

Abstract: A method for the direct separation and determination of ccf+, Cu10, N?+, Zr? ten metal ions in water samples by capillary electrophoresis was established. The effects of buffer solution type, concentration, pH value and organic additives on separation were studied. The separation conditions were optimized for JI of i7l.l2l, separation voltage 25kV, pH = 4.30, 15 0m mol/LH Ac- N aAc (20%) buffer solution, so that the order is at wavelength 223, Cu+, The complexes formed by Ni2 + and + with phenanthroline were well separated in 4 min. The relative standard deviations of migration time and peak area were less than 0.95% and 3.5%, respectively, and the concentration and peak area were good. Linear relationship.

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