One-impedance for one-concentration impedimetry as an electrochemical method for determination of the trace zirconium ion

Abstract

A new method is established for the electrochemical detection of zirconium ion (Zr(IV)) based on electrochemical impedance spectroscopy transduction method, and hydroxamated gold surface recognition system. The method successfully served for the detection of Zr(IV) with a wide dynamic range of 1.0 × 10-9 to 5.0 × 10-5 mol L-1, and a detection limit in nmol L-1 scale. Construction of the calibration curve by "one-impedance for one-concentration" method developed here helped us to save the experimental time by saving the data acquisition time by a factor of ∼20, and further, eliminating data approximation and parameter extraction times. © 2009 Elsevier B.V. All rights reserved.