title: Examination of performance of glassy carbon paste electrode modified with gold nanoparticle and xanthine oxidase for xanthine and hypoxanthine detection.
abstract: A composite electrode was prepared by modifying glassy carbon microparticles with gold nanoparticles (Au-nps) and xanthine oxidase enzyme (XOD) for xanthine (X) and hypoxanthine (Hx) detection. After the optimization of the system for X, the biosensor was characterized for X and Hx. A linearity was obtained in the concentration range between 5.00 x 10(-7) and 1.00 x 10(-5) M for X with equation of y=0.24 x + 0.712 and 5.00 x 10(-6) to 1.50 x 10(-4) M for Hx, with equation of y = 0.014 x + 0.575, respectively. Obtained results were compared to X and/or Hx biosensors including/not including Au-np in the structure. The developed system was also applied for detection of Hx in canned tuna fish sample and very promising results were obtained.
authors: Mugla University, Faculty of Arts and Science, Chemistry Department, 48000 Kötekli, Mugla, Turkiye.
authors: Meliha
authors: M
authors: Cubukçu
authors: Suna
authors: S
authors: Timur
authors: Ulkü
authors: U
authors: Anik
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D002244:Carbon / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D005898:Glass / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D019271:Hypoxanthine / Q000032:analysis*; D016014:Linear Models; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry; D019820:Xanthine / Q000032:analysis*; D014969:Xanthine Oxidase / Q000378:metabolism*
chemical_list: D019820:Xanthine; D019271:Hypoxanthine; D002244:Carbon; D006046:Gold; D014969:Xanthine Oxidase