A multifunctional ratiometric electrochemical sensor for combined determination of indole-3-acetic acid and salicylic acid.

ABSTRACT: Indole-3-acetic acid (IAA) and salicylic acid (SA) are two important phytohormones. In this work, for the first time, a ratiometric electrochemical sensor was developed for quantifying IAA and SA simultaneously. A composite of multi wall carbon nanotubes (MWNT) and carbon black (CB) was used to enhance the sensitivity of electrochemical detection. Ferrocene (Fc) was used as the reference molecule to offer a built-in correction to improve the accuracy. A good linearity was constructed between the I _IAA/I _Fc and the concentration of IAA from 25 μM to 1000 μM. The linear equation was y = 0.00159x + 0.124 (R ² = 0.9887). The LOD for IAA was 1.99 μM. Meanwhile, the I _SA/I _Fc gradually increas

SUBMITTER: Hu Y 

PROVIDER: S-EPMC9048418 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature