An electrochemical sensor modified with poly(3,4-ethylenedioxythiophene)-wrapped multi-walled carbon nanotubes for enzyme inhibition-based determination of organophosphates

Kaur, Navpreet; Thakur, Himkusha; Kumar, Rajesh; Prabhakar, Nirmal

doi:10.1007/s00604-016-1871-y

Cited by 39 publications

(9 citation statements)

References 37 publications

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“…To screen the enzymatic activity, numerous analytical techniques are usually utilized downstream the biochemical reaction. As summarized in Table 4, biosensing strategies, based on chromatographic (Bidmanova et al, 2016;Brack et al, 2002;Shimizu et al, 2013), electrochemical (Anu Prathap et al, 2012Besombes et al, 1995;Kaur et al, 2016;Kim et al, 2008;McArdle and Persaud, 1993;Miao et al, 2016;Nomngongo et al, 2012;Vidal et al, 2008;Wu, 2011;Xia et al, 2015;Xu et al, 2019), potentiometric (Hutter et al, 1995), conductimetric (Anh et al, 2004), spectrophotometric (de Souza et al, 2018Hipólito-Moreno et al, 1998;Q. Liu et al, 2019;Mazurenko et al, 2018;McArdle and Persaud, 1993;Shahar et al, 2019a;Silva et al, 2015) and fluorescence spectroscopic methods (Bidmanova et al, 2016(Bidmanova et al, , 2010Campbell et al, 2006;Mazurenko et al, 2018;Sok and Fragoso, 2018) can be found in literature.…”

Section: Enzymatic Biosensors For Hocs Determinationmentioning

confidence: 99%

“…This device exhibited an RSD of 3.74% and shelf-life of 28 days. Also based on AChE inhibition, Kaur et al (2016) proposed an electrochemical biosensor for the determination of chlorpyrifos-methyl in spiked lettuce. Using voltammetric analysis, the biosensor recovered 95-97% of spiked pesticide concentrations, within an analytical linear range from 1 ng/L to 50 µg/L.…”

Section: Enzymatic Biosensors For Hocs Determinationmentioning

confidence: 99%

See 1 more Smart Citation

Enzymatic assays for the assessment of toxic effects of halogenated organic contaminants in water and food. A review

Artabe

Cunha-Silva

Barranco

2020

Food and Chemical Toxicology

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Halogenated organic compounds are a particular group of contaminants consisting of a large number of substances, and of great concern due to their persistence in the environment, potential for bioaccumulation and toxicity. Some of these compounds have been classified as persistent organic pollutants (POPs) under The Stockholm Convention and many toxicity assessments have been conducted on them previously. In this work we provide an overview of enzymatic assays used in these studies to establish toxic effects and dose-response relationships. Studies in vivo and in vitro have been considered with a particular emphasis on the impact of halogenated compounds on the activity of relevant enzymes to the humans and the environment. Most information available in the literature focuses on chlorinated compounds, but brominated and fluorinated molecules are also the target of increasing numbers of studies. The enzymes identified can be classified as enzymes: i) the activities of which are affected by the presence of halogenated organic compounds, and ii) those involved in their metabolisation/detoxification resulting in increased activities. In both cases the halogen substituent seems to have an important role in the effects observed. Finally, the use of these enzymes in biosensing tools for monitoring of halogenated compounds is described.

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Section: Enzymatic Biosensors For Hocs Determinationmentioning

confidence: 99%

Section: Enzymatic Biosensors For Hocs Determinationmentioning

confidence: 99%

Enzymatic assays for the assessment of toxic effects of halogenated organic contaminants in water and food. A review

Artabe

Cunha-Silva

Barranco

2020

Food and Chemical Toxicology

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“…6 Many methods are available for the synthesis of PEDOT-based materials such as chemical polymerization, 7,8 interfacial polymerization, 9 vapor-phase polymerization (VPP), 10 and electrochemical polymerization. 11,12 The most widely used synthesis methods are electrochemical deposition under oxidation potentials and chemical polymerization in the presence of powerful oxidants. Chemical polymerization is suitable for the large-scale production of PEDOT nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the polymerization of poly (3,4-ethylenedioxythiophene) (PEDOT) starts with radical cations generated from the EDOT monomer, proceeds via further radical–radical coupling reactions that grow the polymer chain progressively, and ends with an insoluble PEDOT chain reaching a sufficient length during which negatively charged counter ions of different sizes join to maintain an electrically neutral polymer . Many methods are available for the synthesis of PEDOT-based materials such as chemical polymerization, , interfacial polymerization, vapor-phase polymerization (VPP), and electrochemical polymerization. , The most widely used synthesis methods are electrochemical deposition under oxidation potentials and chemical polymerization in the presence of powerful oxidants. Chemical polymerization is suitable for the large-scale production of PEDOT nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Synergy between the Assembly of Individual PEDOT Chains and Their Interaction with Light

et al. 2021

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A new method for poly (3, 4-ethylenedioxythiophene) (PEDOT) synthesis based on acid-assisted polymerization is proposed, and the optical and structural properties of the obtained material are explored. Special attention is given to the effect of the polar Bronsted acid on the formation of oligomer/polymer chains and their ability to assemble into nanoobjects. By using 1H and 13C NMR spectroscopy (in the liquid and solid state), the formation of PEDOT in a neutral state was proven. Matrix-assisted laser desorption/ionization–time-of-flight, static light scattering, and dynamic light scattering spectroscopies were used to determine the M w and size of PEDOT nanoobjects. Moreover, we used density functional theory calculations to seek a correlation between the length of the PEDOT oligomer chain and the position of its lowest-energy absorption peak S1. All calculations were performed in concentrated formic acid and compared with calculations in the gas phase. In addition, we demonstrate a correlation between the photoluminescence (PL) from individual PEDOT chains and that from PEDOT chains assembled into nanoobjects. While individual PEDOT chains show four PL peaks, the assembled PEDOT nanoobjects show only one PL peak. Tuning the process of self-assembly for individual PEDOT chains is a promising way to control the properties of a polymer material.

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“…To meet the determination of capsaicinoids content, electrochemical sensors based on carbon nanotubes (CNTs) [14,15], graphene [16,17], and nanoparticles [18] have been developed. Among them, electrochemical sensors modified with CNTs are promising candidates [19][20][21][22]. Kachoosangi et al [23] prepared an electrochemical sensor for detecting capsaicin content with a detection limit of 0.31 mol/L using a pyrolytic graphite electrode modified with a multi-wall carbon nanotube (MWCNT).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Determination of Capsaicinoids Content in Soy Sauce and Pot-Roast Meat Products Based on Glassy Carbon Electrode Modified with Β-Cyclodextrin/Carboxylated Multi-Wall Carbon Nanotubes

Lu²,

Chen³

et al. 2021

Foods

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The rapid quantification of capsaicinoids content is very important for the standardization of pungent taste degree and flavor control of soy sauce and pot-roast meat products. To rapidly quantify the capsaicinoids content in soy sauce and pot-roast meat products, an electrochemical sensor based on β-cyclodextrin/carboxylated multi-wall carbon nanotubes was constructed and the adsorptive stripping voltammetry method was used to enrich samples in this study. The results showed that the excellent performance of the established electrochemical sensor was mostly because β-cyclodextrin caused the relative dispersion of carboxylated multi-wall carbon nanotubes on the glassy carbon electrode surface. Capsaicin and dihydrocapsaicin had similar electrochemical behavior, so the proposed method could determine the total content of capsaicinoids. The linearity of capsaicinoids content was from 0.5 to 100 μmol/L and the detection limit was 0.27 μmol/L. The recovery rates of different capsaicinoids content were between 83.20% and 136.26%, indicating the proposed sensor could realize trace detection of capsaicinoids content in sauce and pot-roast meat products. This work provides a research basis for pungent taste degree standardization and flavor control in the food industry.

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An electrochemical sensor modified with poly(3,4-ethylenedioxythiophene)-wrapped multi-walled carbon nanotubes for enzyme inhibition-based determination of organophosphates

Cited by 39 publications

References 37 publications

Enzymatic assays for the assessment of toxic effects of halogenated organic contaminants in water and food. A review

Enzymatic assays for the assessment of toxic effects of halogenated organic contaminants in water and food. A review

Synergy between the Assembly of Individual PEDOT Chains and Their Interaction with Light

Electrochemical Determination of Capsaicinoids Content in Soy Sauce and Pot-Roast Meat Products Based on Glassy Carbon Electrode Modified with Β-Cyclodextrin/Carboxylated Multi-Wall Carbon Nanotubes

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