A Novel Electrochemical Sensor Based on Modified Carbon Paste Electrode with ZnO Nanorods for the Voltammetric Determination of Indole‐3‐acetic Acid in Plant Seed Extracts
E.M. Rabie, Ahmed A. Shamroukh, M. Khodari
Abstract
Abstract Detection of indole‐3‐acetic acid (IAA), as a phytohormone, is important for precision farming, plant phenotyping, and crop management. Herein, IAA was detected in bean and wheat plant seeds extractions using zinc oxide nanorods/carbon paste electrode (ZnO NRs/CPE). ZnO NRs/CPE showed excellent electrocatalytic activity, high sensitivity, and selectivity toward the oxidation of IAA. The linearity range was from 30.×10 −8 to 5.0×10 −6 M (r 2 =0.996, n=10), with a detection limit of 1.7×10 −8 M. Moreover, ZnO NRs/CPE exhibited high reproducibility, with a standard deviation of 1.0 % for six successive measurements of IAA.
Topics & Concepts
NanorodDetection limitElectrodeReproducibilityZincElectrochemistryIndole-3-acetic acidSelectivityAcetic acidMaterials scienceCarbon paste electrodeCarbon fibersNuclear chemistryInorganic chemistryChemistryNanotechnologyCyclic voltammetryChromatographyOrganic chemistryCatalysisBiochemistryMetallurgyComposite materialPhysical chemistryComposite numberAuxinGeneElectrochemical sensors and biosensorsElectrochemical Analysis and ApplicationsAnalytical Chemistry and Sensors