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

• Published in: Sensors and actuators. B, Chemical Vol. 161; no. 1; pp. 414 - 421
• Main Authors: Sharma, S.P., Farukh, M., Chaturvedi, A., Srivastava, A.R., Suryanarayana, M.V.S., Jain, Rajeev
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2012
• Subjects: detection limit; DIPAET; Electrochemical sensor; electrochemistry; electrodes; electron transfer; Ferrule graphite electrode; graphene; nanoparticles; SWCNT- nFe 3O 4 film; Electrochemical sensor; SWCNT- nFe 3O 4 film; DIPAET; Ferrule graphite electrode
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2011.10.053

An electrochemical sensor based on single-walled carbon nanotube-magnetite nanoparticles (SWCNT- nFe 3O 4) film for the voltammetric determination of 2-diisopropylaminoethanethiol (DIPAET) is described here. The electrochemical behavior of DIPAET at the SWCNT- nFe 3O 4 film modified ferrule graphite electrode (FGE) was investigated by cyclic voltammetry. DIPAET exhibited enhanced voltammetric response at SWCNT- nFe 3O 4 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 ( R 2 = 0.96627).