Activated Copper Cathodes as Sensors for Nitrite Analysis

作者：Gamboa Juan C M; Pena Roselyn C; Paixao Thiago R L C; Lima Alex S; Bertotti Mauro^*

来源：Electroanalysis, 2010, 22(22): 2627-2632.

DOI：10.1002/elan.201000318

• Nitrite
• Copper electrode
• Differential pulse voltammetry
• Scanning electrochemical microscopy.
• Environmental analysis

The increased surface area of copper electrodes upon applying a suitable potential protocol was characterized by atomic force microscopy images. Scanning electrochemical microscopy was used to demonstrate the enhanced reactivity of the generated surface. The modified electrode showed excellent catalytic activity towards nitrite reduction in acidic medium (pH 2). This new platform was used in the development of a fast and simple voltammetric method for nitrite determination. Commercial and rainwater spiked samples were analyzed and the data showed an excellent agreement with those obtained with a reference spectrophotometric method (Griess reaction) at a confidence level of 95% (Student's t-test).

• 出版日期2010-11