Minimization of Interferences in Flow Injection Amperometric Glucose Biosensor Based on Oxidation of Enzymatically-produced H2O2

被引:10
作者
Karakaya, Serkan [1 ]
Dilgin, Yusuf [1 ]
机构
[1] Canakkale Onsekiz Mart Univ, Sci & Arts Fac, Dept Chem, TR-17100 Canakkale, Turkey
关键词
Glucose biosensor; Pencil graphite electrode; Glucose oxidase; Interference minimization; Flow injection analysis; Pre-oxidant; SOLID SODIUM BISMUTHATE; BY-LAYER CONSTRUCTION; PENCIL GRAPHITE; ELECTROCHEMICAL SENSORS; ASCORBATE INTERFERENCE; MNO2; NANOPARTICLES; LACTATE OXIDASE; ENZYME; ELECTRODES; ELIMINATION;
D O I
10.1002/elan.201800887
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
One of the major problems in amperometric biosensors based on detection of H2O2 produced by enzymatic reaction between oxidase enzymes and substrate is the interference of redox active compounds such as ascorbic acid (AA), dopamine (DA) and uric acid (UA). To minimize these interferences, sodium bismuthate was used for the first time as an insoluble pre-oxidant in the flow injection (FI) amperometric glucose biosensor at a Glucose oxidase (GOx) immobilized Pt/Pd bimetallic modified pre-anodized pencil graphite electrode (p.PGE). In this context, these interfering compounds were injected into a flow injection analysis (FIA) system using an injector which was filled with NaBiO3. Thus, these interferents were converted into their redox inactive oxidized forms before reaching the electrode in the flow cell. While glucose was not influenced by the pre-oxidant in the injector, the huge oxidation peak currents of the interferents decreased significantly in the biosensor. FI amperometric current time curves showed that the AA, DA and UA were minimized by 96 %, 86 %, and 98 % respectively, in the presence of an equivalent concentration of interferences in a 1.0 mM glucose solution. The proposed FI amperometric glucose biosensor exhibits a wide linear range (0.01-10 mM, R-2=0.9994) with a detection limit of 2.4x10(-3) mM. Glucose levels in the artificial serum and two real samples were successfully determined using the fabricated FI amperometric biosensor.
引用
收藏
页码:1373 / 1380
页数:8
相关论文
共 53 条
[51]   An amperometric glucose biosensor incorporating a permeable pre-oxidation layer [J].
Zhang, CX ;
Wang, K .
ANALYTICAL LETTERS, 2002, 35 (05) :869-880
[52]   Nano-assemblies consisting of Pd/Pt nanodendrites and poly (diallyldimethylammonium chloride)-coated reduced graphene oxide on glassy carbon electrode for hydrogen peroxide sensors [J].
Zhang, Yanyan ;
Zhang, Cong ;
Zhang, Di ;
Ma, Min ;
Wang, Weizhen ;
Chen, Qiang .
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS, 2016, 58 :1246-1254
[53]   Solution to the problem of interferences in electrochemical sensors using the fill-and-flow channel biosensor [J].
Zhao, M ;
Hibbert, DB ;
Gooding, JJ .
ANALYTICAL CHEMISTRY, 2003, 75 (03) :593-600