Mohamad Syahrizal Ahmad, Illyas Md Isa, Norhayati Hashim, Mohamad Idris Saidin, Suyanta M. Si, Rahadian Zainul, Alizar Ulianas, Siriboon Mukdasai
A sensitive and selective electrochemical sensor for detection of dopamine (DOP) using zinc layered hydroxide-sodium dodecyl sulphate-isoprocarb (ZLH-SDS-I)/multiwalled carbon nanotubes (MWCNT) in 100 mM phosphate buffer solution (PBS) and at the pH 8.0 was developed. The morphology and electrochemistry properties of ZLH-SDS-I/MWCNT nanocomposites were characterized using square wave voltammetry (SWV), transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedence spectroscopy (EIS) and scanning electron microscopy (SEM). Under optimized conditions, the linear analytical curve for determination of dopamine was 1.0 μM to 0.3 mM with the detection limit of 0.43 μM. Besides that, the proposed sensor also exhibited good selectivity, stability, sensitivity and was found to be applicable for dopamine detection in the commercial dopamine hydrochloride injection samples. © 2019 The Authors.
Nanotechnology Research Centre, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim, Perak Darul Ridzuan, 35900, Malaysia; Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim, Perak Darul Ridzuan, 35900, Malaysia; Department of Chemistry Education, Faculty of Mathematics and Natural Science, Yogyakarta State University, Yogyakarta, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Padang, West Sumatera, 25171, Indonesia; Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
