Sensitive electrochemical sensor of anthracene-9-carbonxylic acid using an electropolymerized film modified glassy carbon electrode

Abstract

As a kind of poisonous organic pollutant, anthracene-9-carbonxylic acid (9-ACA) is very harmful to the environment and human health, thus the qualitative and quantitative determination of 9-ACA is of great significance. In this paper, an ultrathin film modified glassy carbon (GC) electrode was prepared by electropolymerization of 5-amino-1,3,4-thiadiazole-2-thiol (AMT) on the GC electrode (p-AMT/GC) and used to detect 9-ACA. Compared to the GC electrode, the p-AMT/GC electrode shows more excellent stability and reproducibility, and meanwhile exhibits higher electrochemical response of 9-ACA due to the unique properties of p-AMT such as large surface area, good electronic properties and catalytic ability. The linear range for 9-ACA detection is from 7.0 × 10⁻⁸ M to 1.1 × 10⁻⁶ M and the detection limit is 1.2 × 10⁻⁸ M (S/N = 3). Finally, the proposed methodology was successfully applied to the detection of 9-ACA in water samples.