Single-walled carbon nanotube-magnetite nanoparticles film modified ferrule graphite electrode for voltammetric determination of 2-diisopropylaminoethanethiol

An electrochemical sensor based on single-walled carbon nanotube-magnetite nanoparticles (SWCNT-nFe3O4) film for the voltammetric determination of 2-diisopropylaminoethanethiol (DIPAET) is described here. The electrochemical behavior of DIPAET at the SWCNT-nFe3O4 film modified ferrule graphite electrode (FGE) was investigated by cyclic voltammetry. DIPAET exhibited enhanced voltammetric response at SWCNT-nFe3O4 modified FGE. This electrochemical sensor shows a favourable analytical performance for DIPAET detection with a detection limit (S/N = 1.4) of 1.41 × 10−10 M, high sensitivity of 53.05 μA/nM and electron transfer rate constant of ∼7.22 s−1. Moreover, DIPAET can be detected in dynamic range of 0.5–4 μg/L with inherent linearity (R2 = 0.96627).