The simpler the better: Highly sensitive 17α-ethinylestradiol sensor based on an unmodified carbon paper transducer

Torrinha, Álvaro; Carneiro, Pedro; Dias, Diana; Delerue–Matos, Cristina; Morais, Simone

doi:10.1016/j.talanta.2022.123457

Cited by 6 publications

(2 citation statements)

References 42 publications

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“…The current densities were obtained by dividing the peak current by the geometric area (about 0.63 cm 2 ) of the CPS immersed in the electrolyte. Morphological characterizations of the untreated and pre-treated CPS were previously performed [ 38 ].…”

Section: Methodsmentioning

confidence: 99%

Carbon Fiber Paper Sensor for Determination of Trimethoprim Antibiotic in Fish Samples

Torrinha

Tavares

Dibo

et al. 2023

Sensors

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The increase in anthropogenic pollution raises serious concerns regarding contamination of water bodies and aquatic species with potential implications on human health. Pharmaceutical compounds are a type of contaminants of emerging concern that are increasingly consumed and, thus, being frequently found in the aquatic environment. In this sense, an electrochemical sensor based on an unmodified and untreated carbon fiber paper (CPS—carbon paper sensor) was simply employed for the analysis of trimethoprim antibiotic in fish samples. First, the analytical conditions were thoroughly optimized in order for the CPS to achieve maximum performance in trimethoprim determination. Therefore, an electrolyte (0.1 M Britton–Robinson buffer) pH of 7 was selected and for square wave voltammetry parameters, optimum values of amplitude, frequency and step potential corresponded to 0.02 V, 50 Hz, and 0.015 V, respectively, whereas the deposition of analyte occurred at +0.7 V for 60 s. In these optimum conditions, the obtained liner range (0.05 to 2 µM), sensitivity (48.8 µA µM−1 cm−2), and LOD (0.065 µM) competes favorably with the commonly used GCE-based sensors or BDD electrodes that employ nanostructuration or are more expensive. The CPS was then applied for trimethoprim determination in fish samples after employing a solid phase extraction procedure based on QuEChERS salts, resulting in recoveries of 105.9 ± 1.8% by the standard addition method.

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Section: Methodsmentioning

confidence: 99%

Carbon Fiber Paper Sensor for Determination of Trimethoprim Antibiotic in Fish Samples

Torrinha

Tavares

Dibo

et al. 2023

Sensors

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“…8,9 Nevertheless, effective sensing can only be achieved if the sensing materials can offer high analytical performance in terms of sensitivity, selectivity, and stability. 10,11 Electrochemical detection of hormones has been made with fluorine-doped tin oxide electrodes, 12 indium tin oxide electrodes, 13 hanging mercury drop electrodes, 14 glassy carbon electrodes, 15 boron-doped diamond electrodes, 16 carbon paste electrodes, 17 screen-printed carbon electrodes, 18 and carbon papers 19 incorporated with carbon nanotubes, 15 reduced graphene oxide, 20 phthalocyanine, 13 and metal and metal oxide nanoparticles of gold, 15 silver, 21 palladium, 22 ruthenium, 23 and iron oxide. 13 One of the main challenges in designing electrochemical sensors for hormones is to reach high sensitivity, which is often provided by a large electrode surface area and efficient electron transfer, while specificity prevents interference of other compounds found in water matrices.…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Nanocables Decorated with Carbon Spherical Shells and Silver Nanoparticles for Sensing Ethinylestradiol Hormone in Water Sources and Pills

Oezau Gomes,

de Campos,

Calegaro

et al. 2024

ACS Appl. Mater. Interfaces

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The selective, rapid detection of low levels of hormones in drinking water and foodstuffs requires materials suitable for inexpensive sensing platforms. We report on core−shell Ag@C nanocables (NCs) decorated with carbon spherical shells (CSSs) and silver nanoparticles (AgNPs) by using a hydrothermal green approach. Sensors were fabricated with homogeneous, porous films on screen-printed electrodes, which comprised a 115 nm silver core covered by a 122 nm thick carbon layer and CSSs with 168 nm in diameter. NCs and CSSs were also decorated with 10−25 nm AgNPs. The NC/CSS/AgNP sensor was used to detect ethinylestradiol using square wave voltammetry in 0.1 M phosphate buffer (pH 7.0) over the 1.0−10.0 μM linear range with a detection limit of 0.76 μM. The sensor was then applied to detect ethinylestradiol in tap water samples and a contraceptive pill with recovery percentages between 93 and 101%. The high performance in terms of sensitivity and selectivity for hormones is attributed to the synergy between the carbon nanomaterials and AgNPs, which not only increased the sensor surface area and provided sites for electron exchange but also imparted an increased surface area.

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Cubic cobalt ferrite anchored on graphene sheets for non-enzymatic electrochemical detection of 17α-ethinyl estradiol in environmental and biological samples

Li,

Zhu,

Zhao

et al. 2024

Journal of Environmental Chemical Engineering

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The simpler the better: Highly sensitive 17α-ethinylestradiol sensor based on an unmodified carbon paper transducer

Cited by 6 publications

References 42 publications

Carbon Fiber Paper Sensor for Determination of Trimethoprim Antibiotic in Fish Samples

Carbon Fiber Paper Sensor for Determination of Trimethoprim Antibiotic in Fish Samples

Core–Shell Nanocables Decorated with Carbon Spherical Shells and Silver Nanoparticles for Sensing Ethinylestradiol Hormone in Water Sources and Pills

Cubic cobalt ferrite anchored on graphene sheets for non-enzymatic electrochemical detection of 17α-ethinyl estradiol in environmental and biological samples

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