A Simple and Sensitive Method for the Amperometric Detection of Trace Chromium(VI) Based on Prussian Blue Modified Glassy Carbon Electrode

作者：Xing Sujie; Xu He; Shi Guoyue^*; Chen Junshui; Zeng Liping; Jin Litong

来源：Electroanalysis, 2009, 21(15): 1678-1684.

DOI：10.1002/elan.200904594

• Chromium
• Prussian blue
• Amperometric detection
• Heavy metals
• Trace analysis

A simple and sensitive method for the amperometric detection of trace amount of chromium(VI) using a Prussian blue modified glassy carbon electrode (PB/GCE) is described here. The Everitts salt/Prussian blue redox couple of the PB film was found to mediate the Cr(VI) reduction, and the mechanism of electrochemical reaction was investigated. The effects of PB film thickness. applied potential and electrolyte solution on the current response of Cr(VI) reduction were thoroughly studied. Under the optimized conditions, the PB/GCE provided a wide linear range for Cr(VI) analysis from 0.5 to 200 ppb with excellent sensitivity (15 /- 0.2 nA/ppb) and low detection limit (0.15 ppb). In addition, the modified electrode showed excellent stability, reproducibility and good resistance to other metal ions and surfactants. Finally, the proposed method was applied to detect trace Cr(VI) in wastewater with satisfactory results. The great advantages of the method were characterized by the simplicity, ease of preparation, stability, short analysis time and cost-efficiency.

• 出版日期2009-8
• 单位华东师范大学