Yardim, YavuzSenturk, Zuhre2025-05-102025-05-1020111300-052710.3906/kim-1011-8052-s2.0-79955787834https://doi.org/10.3906/kim-1011-805https://hdl.handle.net/20.500.14720/11620Senturk, Zuhre/0000-0002-0356-9345; Yardim, Yavuz/0000-0002-9587-096XA method was developed for the simultaneous determination of indole-3-acetic acid (IAA) and kinetin, based on the oxidation of both phytohormones at a pencil-lead graphite electrode. The electrochemical behaviors were examined by cyclic, linear sweep, and square-wave voltammetry in the pH range of 2-12. In Britton-Robinson buffer solution (pH 6), the oxidation peaks of IAA and kinetin are well separated by square-wave voltammetry. By adding an anionic surfactant (sodium dodecylsulfate) in a concentration of 50 mu M, the sensitivity of kinetin was increased significantly without reducing the resolution. The detection limits were 0.14 and 0.11 mu M (24.53 and 23.67 ng mL(-1)) for IAA and kinetin, respectively. Applicability to assays of maize plant extracts was illustrated.eninfo:eu-repo/semantics/openAccessPhytohormonesIndole-3-Acetic AcidKinetinPencil-Lead Graphite ElectrodeSquare-Wave VoltammetryAnionic SurfactantMaize SeedArticle