a sensor for the determination of lindane using pani/zn, fe(iii) oxides and nylon 6,6/mwcnt/zn, fe(iii) oxides nanofibers modified glassy carbon electrode

Abstract

A simple reproducible and environmentally friendly PANI/Zn, Fe(III) and Nylon 6,6/MWCNT/Zn, Fe(III) oxides nanofibers modified glassy carbon electrode was prepared and used for the electrochemical reduction of lindane. The modified electrodes offer a high sensing current for lindane. The modified electrodes were highly stable with respect to time, so that the single electrode can be used for the multiple analysis of the lindane sample. Cyclic voltammetry and square wave voltammetry were used as the sensing techniques. The dynamic range for the lindane determination was between 9.9 × 10−12 mol/L and 5 × 10−6 mol/L with detection limits of 51 and 32 nM for Nylon 6,6/MWCNT/ZnO and Nylon 6,6/MWCNT/Fe3O4 sensors, respectively. The LoD value reveals that the best electrode is Nylon 6,6/MWCNT/Fe3O4. The analytical utility of the proposed method was checked with drinking water samples.