Application Of The Polyfurfural Film Modified Electrode In Nitro Compounds And Heavy Metal Ion Detection

The polymer-modified electrodes have attracted enormous interest in recent years, due to their good stability, containing multiple active sites, homogeneity in electrochemical deposition and strong adherence to electrode surface. In this paper, the polyfurfural film was fabricated to explore their application in electrochemical sensor. The as-prepared polyfurfural film/GCE was characterized by electrochemical impedance spectroscopy. The modified electrode exhibited excellent electrocatalytic activity to target analytes. The polyfurfural film modified electrode can be used to analyze nitro contaminants and heavy metal ion Pb2+ by adjusting the electrochemical parameters. The main points of the dissertation are summarized as follows:1. A novel electrochemical sensor for simultaneous determination of nitrophenol isomers was developed using electrochemically oxidized furfural modified glassy carbon electrode. The electrochemical separation(240 m V(o-NP/m-NP), 160 m V(m-NP/p-NP)) was successfully realized in PBS(7.0). Under the optimum conditions, the linear range for the o-NP, m-NP, p-NP were 5-100 μmol L-1, 0.75-100 μmol L-1, 0.75-100 μmol L-1 and the low detection limit were 0.3, 0.05, 0.04 μmol L-1, respectively. The electrochemical sensor exhibited anti-interference ability, good stability and reproducibility. Additionally, the proposed method was successfully applied to the analysis of real samples with satisfactory results.2. A novel electrochemical sensor for nifedipine was developed using electrochemically oxidized furfural modified GCE. The as-prepared polyfurfural film/GCE was characterized by cyclic voltammetry. The electrochemical behavior of nifedipine were studied using cyclic voltammetry and differential pulse voltammetry. The experimental conditions such as accumulation time, accumulation potential, p H were optimized. Under the optimum conditions, the linear range for nifedipine was 0.01~7 μmol L-1 and the low detection limit were 0.005 μmol L-1, respectively. The proposed method was successfully applied to the analysis of real samples with satisfactory results.3. The electrochemical behavior of nifedipine was studied using CV and DPV. The experimental conditions such as scan rates, accumulation time, p H, accumulation potential were optimized. Under the optimum conditions, the linear range for nitrendipine was 0.1~10 μmol L-1 and the low detection limit were 0.01 μmol L-1, respectively. The proposed method was successfully applied to the analysis of real samples with satisfactory results.4. A novel polyfurfural film/GCE for Pb2+ was developed. The electrochemical behavior of Pb2+ at a polyfurfural film/GCE was studied using CV and DPV. The experimental conditions such as scan rates, accumulation time, p H, accumulation potential were optimized. Under the optimum conditions, the linear range for nitrendipine was 0.1~40 μg L-1 and the low detection limit were 0.01 μg L-1, respectively. The proposed method was successfully applied to the analysis of real samples with satisfactory results.