A Novel Voltammetric Method for the Direct Determination of Copper in Complex Environmental Samples

Abstract

A novel voltammetry with a modified gold electrode for the direct determination of copper in environmental samples, without any pretreatment, is proposed in this paper. A porous disorganized monolayer was formed on the surface of the gold electrode by the self-assembly of mercaptoacetic acid (MAA), which could selectively permeate small molecules. Subtractive square wave anodic stripping voltammetry (SASV) was applied to determine copper, in which the underpotential deposition (UPD) of copper was used as the deposition step. The linear range was from 8 × 10 -7 to 1 × 10 -5 mol l -1 by the modified electrode in the presence of human serum albumin, and the determination was not interfered with common metal ions. Copper in a real environmental sample was successfully detected.

Self-doped Anthranilic Acid-Pyrrole Copolymer/Gold Electrodes for Selective Preconcentration and Determination of Cu(I) by Differential Pulse Anodic Stripping Voltammetry

“…The linear range of more than three orders of magnitude up to 1.0 × 10 -5 M is much more than the linear ranges exhibited by most methods and from the view point of detection limit is comparable with other reported ASV measurements. [34][35][36] …”

Kinetic and equilibrium studies for the adsorption process of cadmium(II) and copper(II) onto Pseudomonas aeruginosa using square wave anodic stripping voltammetry method

“…Anodic stripping voltammetry (ASV) is regarded as a highly sensitive, accurate and convenient technique for trace metal analysis, which is fit for simultaneous analysis of metal ions [11][12][13]. In order to avoid organic macromolecular polluting the electrode surface [14,15], which can lead to the electrode activity loss and reduced sensitivity, a porous film should be modified on the electrode surface.…”

Electroactive Dipyrromethene‐Cu(II) Monolayers Deposited onto Gold Electrodes for Voltammetric Determination of Paracetamol

“…Several reports on the use of SAMs to improve selectivity and sensitivity of gold electrodes in a broad range of electroanalytical applications have been published [6,7]. Despite of the promising properties of SAMs, they also have some weak points.…”