Electrochemical monitoring of methyl parathion degradation based on carbon fiber microelectrodes (CFME)

Tapsoba, Issa; Kabore, B

doi:10.4314/ijbcs.v6i2.28

Cited by 3 publications

(3 citation statements)

References 13 publications

(21 reference statements)

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“…Par ailleurs, il est bien connu dans la littérature que l'électrochimie est une technique utilisée pour l'analyse de composés électro-actifs dans diverses matrices (Tapsoba et al, 2009;Ouedraogo et al, 2013), parfois couplée à la chromatographie liquide comme détecteur (Wu et al, 2007;Novaka et al, 2008;Zielińska et al, 2008;Konieczy-Ski 2015). En effet, Tapsoba et al (2012aTapsoba et al ( , 2012b dans leurs travaux, ont exploité l'électrochimie pour analyser les résidus de pesticides organophosphorés dans les eaux et les sols. Bako et al (2017) quant à eux, ont utilisé les microélectrodes à fibre de carbone modifiées par un polymère de phtalocyanine de nickel tétrasulfonée pour analyser le 3-méthyl-4nitrophénol, métabolite du fénitrothion dans les eaux en suivant l'oxydation du groupement hydroxyle.…”

Section: Introductionunclassified

Etude du comportement électrochimique des flavonoïdes dans l’extrait à l’acétate d’éthyle de <i>Euphorbia hirta</i> L.

Karanga,

Tall,

Bako

et al. 2024

Int. J. Bio. Chem. Sci

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Les extraits de plante sont des mélanges complexes de composés tels que les flavonoïdes dont l’identification nécessite des méthodes conventionnelles souvent sophistiquées et coûteuses. Il est donc nécessaire de développer des méthodes plus simples et abordables en termes de faible coût et de facilité de mise en œuvre pour l’identification de ces composés. Dans le présent travail, nous avons utilisé les méthodes électrochimiques pour étudier le comportement des flavonoïdes en vue de leur identification dans l’extrait d’acétate d’éthyle de Euphorbia hirta L par voltammétrie cyclique. Les voltamogrammes des standards de flavonoïdes ont révélé la présence de plusieurs pics d’oxydation irréversibles attribuables à l’oxydation des différents groupements hydroxyles présents sur l’aglycone. Il ressort de cette étude qu’il serait possible de mettre en évidence la différence entre des flavonoïdes glycosylés et non glycosylés. En effet, l’analyse électrochimique d’un extrait d’acétate d’éthyle de Euphorbia hirta L. et de différentes fractions obtenues à partir d’une chromatographie flash a permis de révéler la présence de la myricitrine, la quercétine, la quercitrine, le kaempférol et la lutéoline dans ces extraits. Les résultats de l’étude ont montré que la méthode électrochimique pourrait être utilisée pour l’identification des flavonoïdes dans les extraits de plantes. English title: Electrochemical behavior of flavonoids from ethyl acetate extract of Euphorbia hirta L. Plant extracts are complex mixtures of compounds such as flavonoids. Identifying these compounds requires conventional methods that are often sophisticated and expensive. It is therefore necessary to develop simples for identification of these compounds. In the present work, we used electrochemical methods to study the behavior of flavonoids for their identification in ethyl acetate extract of Euphorbia hirta L. The voltammograms of the flavonoid standards several irreversible oxidation peaks attributable to the oxidation of the various hydroxyl groups on the aglycone. This study shows that it would be possible to highlight the difference between glycosylated and non- glycosylated flavonoids using the electrochemical tool. Electrochemical analysis of an ethyl acetate extract of Euphorbia hirta L. and various fractions obtained by flash chromatography revealed the presence of myricitrin, quercetin, quercitrin, kaempferol and luteolin in these extracts. The study results showed that the electrochemical method could be used to identify flavonoids in plant extracts

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Section: Introductionunclassified

Etude du comportement électrochimique des flavonoïdes dans l’extrait à l’acétate d’éthyle de <i>Euphorbia hirta</i> L.

Karanga,

Tall,

Bako

et al. 2024

Int. J. Bio. Chem. Sci

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show abstract

“…Simple and advantageous alternatives are electrochemical techniques due to their low cost, high sensitivity and specificity and they do provide fast and reliable analysis [2] [3] [4] [8] [9]. Several studies reported that organophosphate compounds can be detected electrochemically using CFME [5] [10] [11] and CFME modified by use of polymers, enzymes and mercury to improve their sensitivity and selectivity [6] [7] [12] [13]. In previous work, we report the use of CFME modified by nickel tetrasulfonated phthalocyanine polymer (p-NiTSPc) film for methylparathion and its metabolite p-nitrophenol in water [7].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, fenitrothion, an organophosphate insecticide is widely used in cotton cultivation in the north of Burkina Faso in the fight against locust attack. It is well-known that it possesses some toxicity because it acts as acetylcholinesterase inhibitors and its residues and metabolites are present in food chain and environment [2] [3] [4] [5]. Thus, to limit the impact of pesticides on the environment and human health, analytical techniques have been developed to detect their presence and quantify pesticide residues in waters, soils, foods.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensors Based on Modification of Carbon Fiber Microelectrode by Nickel Phthalocyanine Polymer for 3-Methyl-4-Nitrophenol Analysis in Water

Bako¹,

Kabore²,

Tapsoba³

2017

MSA

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Abstract3-methyl-4-nitrophenol (MNP) is the main by-product of the organophosphate insecticide fenitrothion (FT), used in locust control. MNP is highly toxic because it is an endocrine disruptor and then may cause adverse in the biological systems. Then, it is necessary to develop analytical methods for determination of this pollutant in the environment. In this sense, we reported herein the development of an electrochemical sensor for the detection of 3-methyl-4-nitrophenol (MNP), one of the metabolites of fenitrothion (FT), by using naked and modified carbon fiber microelectrode (CFME) by nickel tetrasulfonated phthalocyanine polymer (CFME/p-NiTSPc). The voltammogram showed that MNP presents one irreversible anodic peak corresponding to the oxidation of the phenol group at 0.9 V vs Ag/AgCl. The effect of pH of the buffer on the peak current and SWV parameters such as frequency, scan increment and pulse amplitude were investigated in order to optimize the electrochemical response of the sensor. The obtained results lead to the following optimum value: pH = 6; frequency = 25 Hz, pulse amplitude = 50 mV, scan increment = 10 mV. With these optimum values, the calibration curves show that the peak current varied linearly upon MNP concentration leading to a limit of detection (LoD) for naked CFME close to 3 µg/L whereas for CFME modified by p-NiTSPc, it reaches 0.75 µg/L. This results prove that the presence of p-NiTSPc increasing the sensitivity of the sensor could be used to monitor 3-methyl-4-nitro-phenol residue in real matrix.

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Molecular imprinted polymer modified carbon ultramicroelectrode for a selective detection of 3-methyl-4-nitrophenol and its bioremediation in a fungal microbial fuel cell

Bako,

Silga,

Mbokou Foukmeniok

et al. 2023

J Appl Electrochem

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Electrochemical monitoring of methyl parathion degradation based on carbon fiber microelectrodes (CFME)

Cited by 3 publications

References 13 publications

Etude du comportement électrochimique des flavonoïdes dans l’extrait à l’acétate d’éthyle de <i>Euphorbia hirta</i> L.

Etude du comportement électrochimique des flavonoïdes dans l’extrait à l’acétate d’éthyle de <i>Euphorbia hirta</i> L.

Electrochemical Sensors Based on Modification of Carbon Fiber Microelectrode by Nickel Phthalocyanine Polymer for 3-Methyl-4-Nitrophenol Analysis in Water

Molecular imprinted polymer modified carbon ultramicroelectrode for a selective detection of 3-methyl-4-nitrophenol and its bioremediation in a fungal microbial fuel cell

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