title: A disposable electrochemical sensor for the determination of indole-3-acetic acid based on poly(safranine T)-reduced graphene oxide nanocomposite.
abstract: A disposable electrochemical sensor for the determination of indole-3-acetic acid (IAA) based on nanocomposites of reduced graphene oxide (rGO) and poly(safranine T) (PST) was reported. The sensor was prepared by coating a rGO film on a pre-anodized graphite electrode (AGE) through dipping-drying and electrodepositing a uniform PST layer on the rGO film. Scanning electron microscopic (SEM) and infrared spectroscopic (IR) characterizations indicated that PST-rGO formed a rough and crumpled composite film on AGE, which exhibited high sensitive response for the oxidation of IAA with 147-fold enhancement of the current signal compared with bare AGE. The voltammetric current has a good linear relationship with IAA concentration in the range 1.0×10(-7)-7.0×10(-6)M, with a low detection limit of 5.0×10(-8)M. This sensor has been applied to the determination of IAA in the extract samples of several plant leaves and the recoveries varied in the range of 97.71-103.43%.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
authors.forename: Tian
authors.initials: T
authors.lastname: Gan
authors.forename: Chengguo
authors.initials: C
authors.lastname: Hu
authors.forename: Zilin
authors.initials: Z
authors.lastname: Chen
authors.forename: Shengshui
authors.initials: S
authors.lastname: Hu
mesh_terms: D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D006108:Graphite; D007210:Indoleacetic Acids / Q000032:analysis*; D057230:Limit of Detection; D053761:Nanocomposites / Q000737:chemistry*; D010087:Oxides; D010619:Phenazines; D010936:Plant Extracts / Q000737:chemistry*; D010937:Plant Growth Regulators / Q000032:analysis*; D018515:Plant Leaves; D011108:Polymers
chemical_list: D007210:Indoleacetic Acids; D010087:Oxides; D010619:Phenazines; D010936:Plant Extracts; D010937:Plant Growth Regulators; D011108:Polymers; C030737:indoleacetic acid; D006108:Graphite; C009195:safranine T