Electrochemical Behavior and Voltammetric Determination of 2-Nitrophenol on Glassy Carbon Electrode Surface Modified with 1-Amino-2-Naphthol-4-Sulphonic Acid

Abstract

2NP is among the priority pollutants for the environmental ecosystem and poses a threat to the health of living things by mixing in wastewater. Therefore, the 2NP determination is important. In this study, the glassy carbon (GC) electrode surface was modified with 1-amino-2-naphthol-4-sulfonic acid (ANSA). The electrochemical behavior and voltammetric determination of 2-nitrophenol (2NP) on the modified surface (ANSA-GC) was performed. Firstly, it was decided that the supporting electrolyte medium suitable for 2NP determination was Britton-Robinson (BR) buffer and the effect of pH change on the reduction peak of 2NP in this environment was investigated. The effect of changing scan rate on the reduction peak of 2NP was examined and this study showed that the reduction process of 2NP on the ANSA-GC modified electrode surface was diffusion controlled process. For 2NP determination,two linear working ranges with two different slopes, 1.19×10-6-1.66×10-4 M and 1.66×10-4-1.14×10-3 M were obtained. LOD and LOQ values were calculated as 0.29 µM and 0.97 µM, respectively. Finally, lake water was used as the real sample, and 2NP was determined in this lake water. The experimental results showed that it can be used with a high accuracy and precision in the determination of 2NP with ANSA-GC modified electrode.

Keywords

• Voltammetric determination
• modification
• electrode
• 2-nitrophenol
• toxic

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