title: Low potential detection of indole-3-acetic acid based on the peroxidase-like activity of hemin/reduced graphene oxide nanocomposite.
abstract: An amperometric sensor was firstly established for the detection of indole-3-acetic acid (IAA) at low potential based on the hemin/reduced graphene oxide (hemin/rGO) composite. The hemin/rGO nanocomposite was prepared by a simple and facile hydrothermal method without using any reducing agent. It exhibited peroxidase-like activity for the catalytic oxidation of IAA in the presence of oxygen. The consumption of oxygen has a linear relationship with the concentration of IAA in the range from 0.1 to 43μM and from 43 to 183μM. The detection limit was down to 0.074μM. This sensor was unaffected by many interfering substances and stable over time. Such work broadened the application of hemin/rGO and provided a new method for IAA detection.
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China.
authors: Fengping
authors: F
authors: Liu
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China.
authors: Jiaqian
authors: J
authors: Tang
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China.
authors: Jun
authors: J
authors: Xu
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China.
authors: Yun
authors: Y
authors: Shu
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China. Electronic address: xuqin@yzu.edu.cn.
authors: Qin
authors: Q
authors: Xu
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China.
authors: Hongmei
authors: H
authors: Wang
authors: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 China. Electronic address: xyhu@yzu.edu.cn.
authors: Xiaoya
authors: X
authors: Hu
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry; D002384:Catalysis; D003217:Conductometry / Q000295:instrumentation*; D004789:Enzyme Activation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D006427:Hemin / Q000737:chemistry*; D007210:Indoleacetic Acids / Q000032:analysis* / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D009195:Peroxidase / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D007210:Indoleacetic Acids; D010087:Oxides; C030737:indoleacetic acid; D006427:Hemin; D006108:Graphite; D009195:Peroxidase
keywords: Amperometric; Hemin; Indole-3-acetic acid; Reduced graphene oxide