Copper(II) Electrochemical Sensor Based on Aluminon as Chelating Ionophore

Abstract

In this paper, a simple and effective electrochemical sensor was performed based on the magnetic beads (MBs) and aurintricarboxylic acid ammonium salt called Aluminon (ATA) for sensitive and selective detection of Cu(II) using square wave voltammetry. The ATA/MBs/GCE electrode exhibited enhanced electrochemical response because of the high affinity to Cu(II) of the deposited layer made of the electrodeposited MBs and ATA. Under optimal conditions, a good linear response in the range from 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-6</sup> to 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-4</sup> M with a detection limit of 1.7 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-7</sup> M were obtained. The developed copper sensor was further validated and successfully applied to detect Cu(II) in real water samples. Besides, the copper sensor showed a good anti interference performance, high stability, and excellent regeneration ability.