title: Amperometric Biosensor Based on Zirconium Oxide/Polyethylene Glycol/Tyrosinase Composite Film for the Detection of Phenolic Compounds.
abstract: A phenolic biosensor based on a zirconium oxide/polyethylene glycol/tyrosinase composite film for the detection of phenolic compounds has been explored. The formation of the composite film was expected via electrostatic interaction between hexacetyltrimethylammonium bromide (CTAB), polyethylene glycol (PEG), and zirconium oxide nanoparticles casted on screen printed carbon electrode (SPCE). Herein, the electrode was treated by casting hexacetyltrimethylammonium bromide on SPCE to promote a positively charged surface. Later, zirconium oxide was mixed with polyethylene glycol and the mixture was dropped cast onto the positively charged SPCE/CTAB. Tyrosinase was further immobilized onto the modified SPCE. Characterization of the prepared nanocomposite film and the modified SPCE surface was investigated by scanning electron microscopy (SEM), Electrochemical Impedance Spectroscopy (EIS), and Cyclic voltamogram (CV). The developed biosensor exhibits rapid response for less than 10 s. Two linear calibration curves towards phenol in the concentrations ranges of 0.075-10 µM and 10-55 µM with the detection limit of 0.034 µM were obtained. The biosensor shows high sensitivity and good storage stability for at least 30 days.
authors.affiliation: School of Chemistry and Environment, Faculty of Applied Science, UiTM Kuala Pilah, 72 000 Negeri Sembilan, Malaysia. normonica@gmail.com.|Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. normonica@gmail.com.
authors.forename: Nor Monica
authors.initials: NM
authors.lastname: Ahmad
authors.affiliation: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. jaafar@science.upm.edu.my.
authors.forename: Jaafar
authors.initials: J
authors.lastname: Abdullah
authors.affiliation: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. azahy@science.upm.edu.my.
authors.forename: Nor Azah
authors.initials: NA
authors.lastname: Yusof
authors.affiliation: Industrial Biotechnology Research Centre, SIRIM Berhad, 1, Persiaran Dato' Menteri, P.O. Box 7035, Section 2, 40700 Shah Alam, Selangor, Malaysia. ahazri@sirim.my.
authors.forename: Ahmad Hazri
authors.initials: AH
authors.lastname: Ab Rashid
authors.affiliation: Industrial Biotechnology Research Centre, SIRIM Berhad, 1, Persiaran Dato' Menteri, P.O. Box 7035, Section 2, 40700 Shah Alam, Selangor, Malaysia. sulida@sirim.my.
authors.forename: Samsulida
authors.initials: S
authors.lastname: Abd Rahman
authors.affiliation: Nanotechnology &amp; Catalysis Research Centre, Institute of Postgraduate Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia. rakibacctdu@gmail.com.
authors.forename: Md Rakibul
authors.initials: MR
authors.lastname: Hasan
mesh_terms: D015374:Biosensing Techniques; D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques; D004566:Electrodes; D004800:Enzymes, Immobilized; D014442:Monophenol Monooxygenase; D053758:Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D010636:Phenols; D011092:Polyethylene Glycols; D015203:Reproducibility of Results; D017550:Spectroscopy, Fourier Transform Infrared; D015040:Zirconium
chemical_list: D004800:Enzymes, Immobilized; D010636:Phenols; D011092:Polyethylene Glycols; D015040:Zirconium; D014442:Monophenol Monooxygenase; C028541:zirconium oxide
keywords: phenol detection; tyrosinase; zirconium oxide