Electrochemical quantification of propoxur using a boron-doped diamond electrode

Selva, Thiago Matheus Guimarães; Paixão, Thiago R.L.C.

doi:10.1016/j.diamond.2016.03.027

Cited by 13 publications

(4 citation statements)

References 54 publications

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“…Interestingly, in the last decade or so, there were many reports of different analytical applications based on CPT‐BDDEs, but lacking comparisons with the performance of the APT or as‐grown electrode; the CPT may have been preceded or not by an APT. This direct, trustful use of CPT‐BDDEs is most probably based on the understanding that HT‐BDD surfaces are hydrophobic and thus might better interact with the investigated analyte, consequently resulting in a higher intensity of the current signal …”

Section: Electroanalytical Applications Of Electrochemically Pretreatmentioning

confidence: 99%

Analytical Applications of Electrochemically Pretreated Boron‐Doped Diamond Electrodes

et al. 2020

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The several outstanding properties of boron‐doped diamond electrodes (BDDEs) have allowed their application for various purposes, among them electrochemical sensing. However, the electrochemical response of many redox species on BDDEs can be strongly dependent on whether their surfaces are predominantly hydrogen‐ (HT) or oxygen‐terminated (OT). Fortuitously, electrochemical pretreatments themselves can be used to enrich in situ the BDEE surface in one or the other type of termination. The surface of a cathodically pretreated BBDE (CPT‐BDDE) becomes enriched in HTs, whereas that of an anodically pretreated BDDE (APT‐BDEE) becomes enriched in OTs. Thus, when suitable, the electrochemical activity of a BDDE for a given analyte may be tuned by electrochemical pretreatments, yielding enhanced sensing properties. The main purpose of this review is the compilation and discussion of papers published after 2009 reporting on electroanalytical applications based on a CPT‐BDDE or an APT‐BDDE. Procedures to perform proper electrochemical pretreatments are also discussed.

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Section: Electroanalytical Applications Of Electrochemically Pretreatmentioning

confidence: 99%

Analytical Applications of Electrochemically Pretreated Boron‐Doped Diamond Electrodes

et al. 2020

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“…Using the attained |E p − E p/2 | value for the first cyclic voltammogram at 50 mV s −1 , 84 mV, and considering α = 0.5, αn was determined as being equal to 0.57 and the electron number equal to 1, being the rate-limiting step of the reaction. It has been reported that other carbamate pesticides, as methomyl [13], pirimicarb [27], propoxur [33] and methiocarb [34], exhibited oxidation processes with the participation of only one electron in the nitrogen atom in the conjugated system [50].…”

Section: Electrochemical Behavior Of Fmt On the Pretreated Bddementioning

confidence: 99%

“…The versatility of BDDE for pesticide determination has been demonstrated in few studies [13,27,[33][34][35][36], which included five carbamates (methomyl in river and tap water and commercial formulations [13], pirimicarb in tap and weir water [27], propoxur in tap and weir water and a pesticide formulation [33], methiocarb in commercial pesticide [34], and carbaryl in natural water [35] and in natural water and pineapple juice [36]). To the best of our knowledge, there is no study regarding the exploitation of BDDE as sensor for formetanate hydrochloride (3-dimethyl amino methylene aminophenyl methylcarbamate hydrochloride, FMT) nor the determination of this pesticide with an unmodified solid electrode.…”

Section: Introductionmentioning

confidence: 99%

Sensing of formetanate pesticide in fruits with a boron-doped diamond electrode

Ribeiro

Sousa

Morais

et al. 2018

Microchemical Journal

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This study describes the development of a simple and accurate methodology for carbamate pesticide formetanate (FMT) analysis in fruits based on the use of a boron-diamond doped electrode (BDDE) cathodically pretreated and on the forward component of the current of square-wave voltammetry (SWV). FMT exhibits a well-defined irreversible oxidation process, which reaction mechanism is diffusion-controlled, involves the participation of one electron and is influenced by the electrolyte pH. However, protonation does not participate in the ratedetermining step in the redox process. The optimum experimental and voltammetric conditions were pH 7.0 (0.04 mol L −1 Britton-Robinson buffer), pulse potential frequency of 20 s −1 , amplitude of the pulse of 25 mV, and height of the potential step of 3 mV. Under the optimum conditions, calibration curve was linear from 4.98 × 10 −7 to 1.70 × 10 −5 mol L −1 FMT with a limit of detection of 3.7 × 10 −7 mol L −1. FMT sensing was performed in different fruits (mango and grape). Recoveries ranged from 95.2 ± 2.8 to 104.0 ± 3.5% for mango and 96.5 ± 2.5 to 105.2 ± 3.5% for grape proving the accuracy and precision of the electroanalytical methodology. The attained data validated the applicability of the developed approach for FMT quantification in fruits.

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“…[30][31][32][33] Even after giving good results, these require highly trained personnel, prolonged detection times and sample conditioning, apart from elevated overheads. However, on the other hand, an alternative developed to achieve competitive quantification of pesticides is based on using simple electrochemical sensors, like the enzymatic biosensors, 34,35 voltammetry sensors, 36 which aside from being flexible, are highly reliable, practical, have displayed significant reproducibility, sensibility and stability. Further, it is worthy to underline that such sensors are readily prepared and the ensuing determinations are quickly performed at comparatively less expenditure than those aforementioned.…”

mentioning

confidence: 99%

Construction and Optimization of a Novel Acetylcholine Ion-Selective Electrode and its Application for Trace Level Determination of Propoxur Pesticide

Juárez-Gómez

Ramı́rez-Silva

Guzmán-Hernández

et al. 2020

J. Electrochem. Soc.

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This research presents the construction and optimization of an acetylcholine, ACh, ion-selective electrode, ACh-ISE, aiming to use it for the quantification of the propoxur pesticide. This analytical quantification is based on the evaluation of the acetylcholinesterase enzyme inhibition percentage, %EI, provoked by the pesticide, as a function of propoxur concentration; where the %EI is followed by means of the potentiometric determination of acetylcholine that does not react with the enzyme, using the constructed ACh-ISE. It was found that the ACh-ISE depicted a sub-Nernstian slope of (42.7 ± 2.8) mV decade −1 , a ACh detection limit of 1.2 × 10 −5 mol l −1 , and the selectivity constants, K pot , of 0.03 and 0.24 for Na + and Choline + cations, respectively. K + and Ca 2+ did not interfere. This new method designed to determine propoxur attained an outstanding detection limit of (2.89 ± 0.97) × 10 −17 mol l −1 and a linear interval of (5.5 × 10 −15 -1.0 × 10 −4 ) mol l −1 .

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Electrochemical quantification of propoxur using a boron-doped diamond electrode

Cited by 13 publications

References 54 publications

Analytical Applications of Electrochemically Pretreated Boron‐Doped Diamond Electrodes

Analytical Applications of Electrochemically Pretreated Boron‐Doped Diamond Electrodes

Sensing of formetanate pesticide in fruits with a boron-doped diamond electrode

Construction and Optimization of a Novel Acetylcholine Ion-Selective Electrode and its Application for Trace Level Determination of Propoxur Pesticide

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