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

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 À 8 to 5.0 × 10 À 6 M (r 2 = 0.996, n = 10), with a detection limit of 1.7 × 10 À 8 M. Moreover, ZnO NRs/CPE exhibited high reproducibility, with a standard deviation of 1.0 % for six successive measurements of IAA.

Fabrication of an electrochemical sensor based on eggshell waste recycling for the voltammetric simultaneous detection of the antibiotics ofloxacin and ciprofloxacin

“…The bare CPE (BCPE) was prepared as described previously elsewhere [ 12 , 13 ]. Meanwhile, Ca 2 CuO 3 NS/CPE was made by combining pure graphite, paraffin wax, and Ca 2 CuO 3 NS by the percentage 60:25:15, respectively.…”

“…These techniques can identify and separate FQs, but their general use is constrained by their complicated sample pretreatment procedures and pricey equipment. On the other hand, the electrochemical analysis approach has lately been used for FQs measurement due to its simplicity, speedy assay time, and affordable instrumentation [ 12 , 13 ].…”

Polydopamine Modified Carbon Nitride and PAMAM Assembled Electrochemical Immunosensor for Detection of Indole‐3‐Acetic Acid

“…Various electrochemical detection methods have been developed to detect IAA such as differential pulse voltammetry (DPV), square wave voltammetry (SWV), electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV). [8][9][10][11] Electrochemical sensors IAA offer several advantages over traditional detection methods, such as higher sensitivity, minimal detection threshold and rapid response time. [12][13][14] The interaction between IAA and sensor can be facilitated by immobilizing a biological recognition element such as enzyme or antibody on the electrode surface, which specifically binds to IAA and induces a change in the electrochemical signal.…”

“…Nevertheless, these methods are typically costly and time‐intensive. Various electrochemical detection methods have been developed to detect IAA such as differential pulse voltammetry (DPV), square wave voltammetry (SWV), electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) [8–11] . Electrochemical sensors IAA offer several advantages over traditional detection methods, such as higher sensitivity, minimal detection threshold and rapid response time [12–14] .…”

Electrochemical sensor based on a poly-murexide modified carbon paste electrode for determination of fluoroquinolone antibiotic ciprofloxacin

“…Chemical modification of the electrodes can improve the electrochemical detection of electroactive substances. Recent years have seen a rise in interest in modified CPEs because of their many advantages, including low background current, a wide variety of potential windows, low cost, fast manufacture, and quick surface renewal (Khodari et al, 1989;Nassar et al, 2022;Rabie et al, 2022;Švancara et al, 2009). Various modifiers have been employed on CPEs to promote the electron transfer process (Dehdashtian et al, 2016).…”