Abstract
This article reports a simple and low-cost methodology for the determination of europium(III) ion (Eu3+) by differential pulse voltammetry (DPV) using a LaB6 electrode with sodium dodecylbenzene sulfonate (SDBS). The performance of the sensor was initially assessed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Good linear relationship between the DPV peak current and the concentration of Eu3+ is obtained in the range of 10 nM to 2.0 μM. The limit of detection was found to be 6.0 nM (S/N = 3). The proposed sensor is easy to be fabricated and has very good reproducibility, good stability and long life-time in its voltammetric response to Eu3+. The mechanism of electrocatalytic oxidation of Eu3+ at the LaB6 electrode containing SDBS is also investigated in detail. Our developed electrochemical sensor provides an attractive alternative choice for the determination of Eu3+ in field applications.
Original language | English |
---|---|
Pages (from-to) | 152-158 |
Number of pages | 7 |
Journal | Sensors and Actuators B: Chemical |
Volume | 147 |
Issue number | 1 |
DOIs | |
Publication status | Published - 18 May 2010 |
Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry
User-Defined Keywords
- Electrochemical sensor
- Eu(III)
- LaB electrode
- SDBS