Screen-printed disposable electrodes using graphite-polyurethane composites modified with magnetite and chitosan-coated magnetite nanoparticles for voltammetric epinephrine sensing: a comparative study

Mattioli, Isabela A.; Cervini, Priscila; Cavalheiro, Éder Tadeu Gomes

doi:10.1007/s00604-020-04259-x

Cited by 22 publications

(6 citation statements)

References 40 publications

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“…5f) was obtained between 2.0 x 10 − 7 and 1.0 x 10 6 mol L 1 , with an LOD of 6.61 x 10 − 8 mol L − 1 and R = 0.9989, for n = 5. This LOD was comparable to recent studies of other electrode compositions 11,21 , but lower than that observed for some more expensive or non-usual materials [18][19][20][21][22] . However, GPUE-FA has the advantage of being composed of inexpensive and recycled materials, making it more nancially and environmentally friendly.…”

Section: Analytical Evaluationsupporting

confidence: 87%

“…However, at higher FA loadings (ca. 10% (m/m)) the interaction with the metallic species is less signi cant than the occupation of the conductive graphite sites, resulting in a decreased current 9,11 .…”

Section: Determining the Best Modi Er Loadingmentioning

confidence: 99%

“…The graphite-polyurethane composite electrode (GPUE) used in this work offers advantages such as high hydrophobicity, resistance to non-aqueous solvents and a wide useful potential window in both acidic and basic media. In addition, it is easy to incorporate different types of modi ers since it is prepared from a liquid polymer 11 . Our group has published several papers using this electrode, without [12][13][14] and with modi cation 15,16 , but this is the rst attempt of using FA as a modi er.…”

Section: Introductionmentioning

confidence: 99%

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Development of coal fly ash modified graphite-polyurethane composite electrodes for the determination of Cd(II) in batteries and water

Barros

Cervini

Buoro

et al. 2022

Preprint

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Coal fly ash (FA), an aluminium silicate by-product and environmental pollutant which is generated during the combustion of coal in coal-fired power stations, was used for the first time as an electrode modifier for the determination of metallic cations. Thus, graphite/polyurethane-based composites containing different amounts of FA were prepared and characterized by SEM, EDX and TGA/DTG. The graphite/polyurethane composite electrodes (GPUE), with and without FA modifier, were evaluated with regard to their performance as voltammetric electrodes in the determination of metallic cations, using Cd(II) as a probe. After optimizing solution and instrumental parameters affecting the voltammetric peak current, a differential pulse anode stripping voltammetry (DPASV) procedure was developed for GPUE modified with 5% FA (m/m), resulting in a linear response for Cd(II) in the range 2.0 x 10‑7 to 1.0 x 10‑6 mol L-1 with a detection limit (LOD) of 6.6 x 10-8 mol L-1. Cd(II) was added to natural water samples and determined in concentrations at 10-7 mol L-1 level, with a mean recovery of 99%. It was also extracted from exhausted rechargeable Ni-Cd batteries and diluted to ca. 0.2 µmol L-1 and determined with the same electrode, with recoveries of 98.7% when compared to FAAS. These results serve as a proof of concept that FA is a useful electrode modifier for determination of cationic species.

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Section: Analytical Evaluationsupporting

confidence: 87%

Section: Determining the Best Modi Er Loadingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of coal fly ash modified graphite-polyurethane composite electrodes for the determination of Cd(II) in batteries and water

Barros

Cervini

Buoro

et al. 2022

Preprint

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“…Mattioli et al fabricated an electrochemical sensor that employed screen-printed electrodes modified with graphite–polyurethane composites decorated with magnetite (SPE-MNP) and magnetite nanoparticles coated with chitosan (SPE-CHMNP) for sensing EP. 63 The sensing ability of both SPE-MNP and SPE-CHMNP for EP was compared. For EP detection, 1.0 mmol L −1 EP solution was made in 0.1 mol L −1 PBS (pH 7).…”

Section: Biopolymer-based Electrochemical Methods For the Sensing Of ...mentioning

confidence: 99%

Biopolymer supported electroanalytical methods for the determination of biomolecules and food additives – a comprehensive perspective

Rajamani,

C.,

P. J.

et al. 2023

Anal. Methods

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“…Additional references are cited within the Supporting Information. [47][48][49][50][51][52][53][54][55][56][57][58][59][60]…”

Section: Supporting Informationmentioning

confidence: 99%

Highly Selective and Quantitative Point‐of‐Care Diagnostic Method for Adrenaline

Koppayithodi

Jana

Bandyopadhyay

2023

Chemistry A European J

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Adrenaline, also known as epinephrine, is a neurotransmitter/hormone that is an important target in diagnostics. Development of an effective method for detecting it in the presence of other neurotransmitters is a challenging task. The electrochemical and fluorescent techniques commonly used have low selectivity in distinguishing among catecholamines. Herein, a small‐molecule organic probe with an activated furfural moiety is reported to exploit the nucleophilicity of epinephrine to generate a bright‐colored donor–acceptor Stenhouse adduct. Among nine common neurotransmitters or their analogues, only epinephrine was found to generate a unique colour change discernible with the naked eye, whereas the other ones remain unaffected. Under various in‐field detection conditions, including solution, droplet, and paper strip‐based detection, the colour change were also noticeable. The low detection limit of 1.37 nM and a limit of quantitation of 4.37 nM were achieved with simple UV/Vis methods in addition to the sub‐ppm level sensing under visual conditions with naked eyes. The probe could be used for practical colorimetric measurements as a point‐of‐care tool without any complex and expensive machinery, making this approach accessible to all. In addition, using a simple smartphone, the determination of epinephrine concentrations is possible by using machine‐learning techniques.

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Screen-printed disposable electrodes using graphite-polyurethane composites modified with magnetite and chitosan-coated magnetite nanoparticles for voltammetric epinephrine sensing: a comparative study

Cited by 22 publications

References 40 publications

Development of coal fly ash modified graphite-polyurethane composite electrodes for the determination of Cd(II) in batteries and water

Development of coal fly ash modified graphite-polyurethane composite electrodes for the determination of Cd(II) in batteries and water

Biopolymer supported electroanalytical methods for the determination of biomolecules and food additives – a comprehensive perspective

Highly Selective and Quantitative Point‐of‐Care Diagnostic Method for Adrenaline

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