Nurashikin Abd Azis, Illyas Md Isa, Norhayati Hashim, Mohamad Syahrizal Ahmad, Siti Nur Akmar Mohd Yazid, Mohamad Idris Saidin, Suyanta M. Si, Rahadian Zainul, Alizar Ulianas, Siriboon Mukdasai
A multiwalled carbon nanotube paste electrode (MWCNTPE) modified with zinc aluminium layered double hydroxide-quinmerac (Zn/Al-LDH-QM) was fabricated for simultaneous determination of uric acid and bisphenol A. This modified electrode was characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), and electrochemical methods. Several experimental conditions such as percent of modifier, pH of the solution, and square wave voltammetry parameters were optimized. The effective surface area of the electrode were determined by chronocoulometry. There was several linear range where the sensor performs well which are within the concentration 0.3-30.0 μM and 50.0-100.0 μM for uric acid, and 0.3-50.0 μM and 10.0-100.0 μM for bisphenol A. The detection limit for both organics were 0.065 μM and 0.049 μM, respectively. The modified MWCNTPE was also tested for the determination of uric acid and bisphenol A in real samples and achieved high recoveries percentage from 98.0% to 108.3 %. © 2019 Electrochemical Science Group.
Department of Chemistry, Universiti Pendidikan Sultan Idris, Tanjong Malim, Perak, 35900, Malaysia; Nanotechnology Research Centre, Universiti Pendidikan Sultan Idris, Tanjong Malim, Perak, 35900, Malaysia; Deparment of Chemistry Education, Yogyakarta State University, Indonesia; Department of Chemistry, Universitas Negeri Padang, West Sumatera, 25171, Indonesia; Department of Chemistry, Khon Kaen University, Khon Kaen, 40002, Thailand
