Preparation of selective micro glucose sensor without permselective membrane by electrochemical deposition of ruthenium and glucose oxidase |
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| Affiliation: | 1. Department of Biomedical Science, Faculty of Health and Society, Biofilms - Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden;2. Sterisol AB, 592 23 Vadstena, Sweden;3. Department of Physical Chemistry and Geoscience, Vilnius University, LT-03225 Vilnius, Lithuania;4. NanoTechnas – Center of Nanotechnology and Materials Science, Faculty of Chemistry and Geosciences, Vilnius University, LT-03225 Vilnius, Lithuania;1. Crystal Growth Centre, Anna University, Guindy, Chennai-600 025, Tamilnadu, India;2. Centre for Nanotechnology Research, VIT, Vellore-632 014, Tamilnadu, India;1. Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global) & Dept. of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk, 561-756, Republic of Korea;2. Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Eunha-ri San 101, Bongdong-eup, Wanju-gun, Jeonbuk, 565-905, Republic of Korea;3. Carbon Composite Research Centre, Department of Polymer & Nanoscience and Technology, Chonbuk National University Jeonju, Jeonbuk, 561-756, Republic of Korea;1. Chemical Injuries Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran;2. Laboratory for Sensors, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges Köhler Allee 103, 79110 Freiburg, Germany;3. Young Researchers and Elite Club, Hamedan Branch, Islamic Azad University, Hamedan, Iran;1. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China;2. School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, China |
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| Abstract: | ![]()
A carbon fiber microelectrode, surface of which ruthenium and glucose oxidase (GOx) were electrochemically codeposited, has been investigated. The Ru deposition onto the microelectrode increased current response to H2O2 oxidation, while decreased oxidation currents due to interfering substances, such as ascorbic acid, uric acid, p-acetamidophenol, l-cysteine and dopamine. The codeposition of Ru and GOx gave further suppression of the interfering signals with keeping the current response to H2O2. When amperometric glucose sensing was conducted by using the GOx and Ru modified microelectrode, an increase in GOx concentration in the deposition bath enlarged oxidation current of H2O2 generated from glucose oxidation by GOx. The presence of ascorbic acid in analyte gave no error in detection of glucose and errors caused by uric acid was +3% at the most for measuring 5 mM glucose, which is the normal physiological level in blood. |
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