Simultaneous Determination of Copper (II) and Mercury (II) by Using a Zero-Crossing Method

H. M. Seco-Lago Department of Analytical Chemistry, University School Polytechnic of Ferrol, University of A Coruña. Ctra. Aneiros s/n, Serantes, 15405, Ferrol, Spain

J. Pérez-Iglesias Department of Analytical Chemistry, University School Polytechnic of Ferrol, University of A Coruña. Ctra. Aneiros s/n, Serantes, 15405, Ferrol, Spain

J. M. Fernández-Solís Department of Analytical Chemistry, University School Polytechnic of Ferrol, University of A Coruña. Ctra. Aneiros s/n, Serantes, 15405, Ferrol, Spain

J. M. Castro-Romero Department of Analytical Chemistry, University School Polytechnic of Ferrol, University of A Coruña. Ctra. Aneiros s/n, Serantes, 15405, Ferrol, Spain

V. González-Rodríguez Department of Analytical Chemistry, University School Polytechnic of Ferrol, University of A Coruña. Ctra. Aneiros s/n, Serantes, 15405, Ferrol, Spain

Abstract

The application of a zero-crossing method to the simultaneous determination of copper (II) and mercury (II) with methylethylenediaminetetraacetic acid (MEDTA) is described. The procedure does not require equations to be solved, and it is suitable for concentrations of 0.008–0.036 mg ml⁻¹ of copper and 0.025–0.300 mg ml⁻¹ of mercury. The main interferences, both anionic and cationic, were easily eliminated. The method was applied to different aqueous matrices. It was compared with an atomic absorption spectrophotometry method (AA) and good results were obtained.

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Simultaneous Determination of Copper (II) and Mercury (II) by Using a Zero-Crossing Method

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Simultaneous Determination of Copper (II) and Mercury (II) by Using a Zero-Crossing Method

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