Biochemistry & Analytical Biochemistry

Pundir CS

Publications

• Research Article
  Covalent Immobilization of Lactate Oxidase onto Zirconia Coated Silica Nanoparticles/Chitosan Hybrid Film for Amperometric Determination of Lactate
  Author(s): Kusum Dagar and Pundir CS Kusum Dagar and Pundir CS
  
  An improved amperometric L-lactate biosensor was constructed based on covalent immobilization of lactate oxidase (LOx) onto zirconia coated silica nanoparticles (SiO2@ZrONPs)/chitosan (CHIT) hybrid film electrodeposited on the surface of a gold electrode (AuE). The enzyme electrode was characterized by cyclic voltammetry (CV), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and electrochemical impedance spectroscopy (EIS), while SiO2@ZrONPs were synthesized by chemical reduction method and characterized by transmission electron microscopy (TEM), UV spectroscopy and X-ray diffraction (XRD). The biosensor showed an optimal response within 3s at pH 7.5 in 0.05M sodium phosphate buffer and 30°C, when operated at 20 mVs-1. The biosensor had a low detection limit of 0.2 nM with a wide working / linear range between 0.1 – 4000 μM. The biosensor.. View More»
  DOI: 10.4172/2161-1009.1000301

  Abstract PDF