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

Hu, Ye; Wang, Xiaodong; Wang, Cheng; Hou, Peichen; Dong, Hongtu; Luo, Bin; Li, Aixue

doi:10.1039/c9ra09951d

Cited by 23 publications

(10 citation statements)

References 39 publications

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“…3C and D, suggesting the sensitivity of the sensor can be improved by the double signal output greatly. Compared with some other electrochemical sensors of SA summarized in Table 1, 1,[31][32][33][34][35][36] although the LOD of our sensor was not lower than other sensors, the detection range of our sensor was wider than that of most sensors, and it can cover a large part of concentration range of SA in most plants, which is in the range of nM to mM. 37 More importantly, it is accurate, reliable and practical.…”

Section: Performance Of the Cu-mofs-cb-naon/spe Electrode For Detectmentioning

confidence: 84%

Ratiometric electrochemical sensor for accurate detection of salicylic acid in leaves of living plants

et al. 2020

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Section: Performance Of the Cu-mofs-cb-naon/spe Electrode For Detectmentioning

confidence: 84%

Ratiometric electrochemical sensor for accurate detection of salicylic acid in leaves of living plants

et al. 2020

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“…However, the reproducibility of the electrode was demonstrated with an intra-electrode RSD of 0.7%, and an inter-electrode RSD of 5.0%, over five electrodes. Other modified CNTs include Fc labelling for the detection of nitrophenols [107], and phytohormones [108], and nitrogen-doped nanosheets for the detection of metal ions [109]. Carbon nanotubes were also integral to the detection of heavy metal ions by Shen et al [110].…”

Section: (B) Metal Organic Frameworkmentioning

confidence: 99%

Ratiometric Electrochemistry: Improving the Robustness, Reproducibility and Reliability of Biosensors

Spring

Goggins²,

Frost

2021

Molecules

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Electrochemical biosensors are an increasingly attractive option for the development of a novel analyte detection method, especially when integration within a point-of-use device is the overall objective. In this context, accuracy and sensitivity are not compromised when working with opaque samples as the electrical readout signal can be directly read by a device without the need for any signal transduction. However, electrochemical detection can be susceptible to substantial signal drift and increased signal error. This is most apparent when analysing complex mixtures and when using small, single-use, screen-printed electrodes. Over recent years, analytical scientists have taken inspiration from self-referencing ratiometric fluorescence methods to counteract these problems and have begun to develop ratiometric electrochemical protocols to improve sensor accuracy and reliability. This review will provide coverage of key developments in ratiometric electrochemical (bio)sensors, highlighting innovative assay design, and the experiments performed that challenge assay robustness and reliability.

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“…Indole-3-acetic acid (IAA) and salicylic acid (SA) are the two most typical electroactive phytohormones. In recent years, electrochemical sensors based on carbon materials (multiwalled carbon nanotubes (MWCNTs)–chitosan [ 12 ], carboxymethyl cellulose–montmorillonite single walled carbon nanotube [ 13 ], graphene oxide-modified carbon tape [ 14 ], gold nanoparticles-doped graphene hydrogel nanocomposites [ 15 ], graphene hydrogel [ 16 ], MWCNTs–carbon black composites [ 13 ], and carbon cement [ 17 ]) for IAA and SA detection have been reported. However, developing an effective method for sensitive simultaneous detection of phytohormones remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Electrochemical Sensing of Indole-3-Acetic Acid and Salicylic Acid on Poly(L-Proline) Nanoparticles–Carbon Dots–Multiwalled Carbon Nanotubes Composite-Modified Electrode

Kuang

Fan

et al. 2022

Sensors

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Sensitive simultaneous electrochemical sensing of phytohormones indole-3-acetic acid and salicylic acid based on a novel poly(L-Proline) nanoparticles–carbon dots composite consisting of multiwalled carbon nanotubes was reported in this study. The poly(L-Proline) nanoparticles–carbon dots composite was facilely prepared by the hydrothermal method, and L-Proline was used as a monomer and carbon source for the preparation of poly(L-Proline) nanoparticles and carbon dots, respectively. Then, the poly(L-Proline) nanoparticles–carbon dots–multiwalled carbon nanotubes composite was prepared by ultrasonic mixing of poly(L-Proline) nanoparticles–carbon dots composite dispersion and multiwalled carbon nanotubes. Scanning electron microscope, transmission electron microscope, Fourier transform infrared spectroscopy, ultraviolet visible spectroscopy, energy dispersive spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and linear sweep voltammetry were used to characterize the properties of the composite. poly(L-Proline) nanoparticles were found to significantly enhance the conductivity and sensing performance of the composite. Under optimal conditions, the composite-modified electrode exhibited a wide linear range from 0.05 to 25 μM for indole-3-acetic acid and from 0.2 to 60 μM for salicylic acid with detection limits of 0.007 μM and 0.1 μM (S/N = 3), respectively. In addition, the proposed sensor was also applied to simultaneously test indole-3-acetic acid and salicylic acid in real leaf samples with satisfactory recovery.

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

Abstract: For the first time, a multifunctional ratiometric electrochemical sensor was developed for quantifying IAA and SA simultaneously.

Cited by 23 publications

References 39 publications

Ratiometric electrochemical sensor for accurate detection of salicylic acid in leaves of living plants

Ratiometric electrochemical sensor for accurate detection of salicylic acid in leaves of living plants

Ratiometric Electrochemistry: Improving the Robustness, Reproducibility and Reliability of Biosensors

Simultaneous Electrochemical Sensing of Indole-3-Acetic Acid and Salicylic Acid on Poly(L-Proline) Nanoparticles–Carbon Dots–Multiwalled Carbon Nanotubes Composite-Modified Electrode

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