Heparin-stabilized gold nanoparticles embedded in graphene for the electrochemical determination of esculetin

Analytical Methods, Journal Year: 2024, Volume and Issue: 16(15), P. 2256 - 2266

Published: Jan. 1, 2024

A conductive nanocomposite consisting of heparin-stabilized gold nanoparticles embedded in graphene was prepared for esculetin determination tea and jam samples.

Language: Английский

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The core–shell structure ZIF-67/MIL-101 (Fe)-modified carbon paper electrode: high sensitivity and selectivity for the determination of baicalin

Journal of Solid State Electrochemistry, Journal Year: 2024, Volume and Issue: 28(8), P. 2959 - 2971

Published: Jan. 18, 2024

Language: Английский

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ZIF-67/PEDOT modified carbon paper electrode for sensitive electrochemical determination of chlorogenic acids

Journal of Electroanalytical Chemistry, Journal Year: 2024, Volume and Issue: 961, P. 118235 - 118235

Published: April 1, 2024

Language: Английский

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Synthesis of Bismuth Film Assembly on Flexible Carbon Cloth for the Electrochemical Detection of Heavy Metal Ions

Chemosensors, Journal Year: 2024, Volume and Issue: 12(6), P. 103 - 103

Published: June 6, 2024

The utilization of bismuth as a sensing material for the detection heavy metal ions has gained significant attention due to its exceptional interfacial activity and selective absorption properties. However, it also poses challenges in terms agglomeration inferior electrical conductivity during synthesis process. This paper employed facile situ electrodeposition approach uniformly grow film on conductive carbon cloth, designated Bi/Ag@CC. Bi/Ag@CC electrode exhibited benign electrochemical properties, enabling application detecting Pb2+ tap water lake samples. Furthermore, this work investigated impact parameters, including electrolyte pH, deposition potential pre-enrichment time, performance. results demonstrated sensor’s wide linear range (from 20 400 ppb) limits (0.15 ion detection, along with excellent anti-interference capabilities satisfactory repeatability, an RSD less than 2.31% (n = 6). offers novel strategy positioning bismuth-based composite promising candidate practical applications.

Language: Английский

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Exploring Deposition Techniques and Supramolecular Arrangement in Thin Films for Sensor Applications

Chemosensors, Journal Year: 2023, Volume and Issue: 11(10), P. 524 - 524

Published: Oct. 5, 2023

In recent decades, many research efforts have been dedicated to finding highly sensitive devices for fast and reliable identification quantification of an expanding range analytes. As a result, there has increased number publications this area consequent increase in the review papers on subject. However, unlike most articles, we chose explore impact supramolecular arrangement (or deeper, when possible, approaching molecular organization) assembly variables sensing performance. This briefly discusses methods used determine organization thin films. We also examine various deposition techniques, including Langmuir-Blodgett, Langmuir-Schaefer, Layer-by-Layer assembly, electrodeposition, spray pyrolysis, describing mainly (but not limited to) advances last five years developing films sensors, with particular emphasis how can influence properties these

Language: Английский

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Development of an environmentally friendly method for the determination of prednisolone in natural waters using unmodified boron-doped diamond electrode

Journal of Solid State Electrochemistry, Journal Year: 2024, Volume and Issue: unknown

Published: April 18, 2024

Language: Английский

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Review—Trends on the Development of Non-Enzymatic Electrochemical Sensors Modified with Molecularly Imprinted Polymers for the Quantification of Glucose

Journal of The Electrochemical Society, Journal Year: 2024, Volume and Issue: 171(7), P. 077506 - 077506

Published: June 28, 2024

Glucose is the principal source of energy for humans and its quantification in physiological samples can diagnose or prevent diseases. Commonly, glucose determination based on spectrophotometric-enzymatic techniques, but since at least a decade ago, electroanalytical strategies have emerged as promising alternatives providing accuracy precision biomolecules. This review focuses development non-enzymatic methodologies modified electrochemical sensors with molecularly imprinted polymers (MIPs) detection (blood, saliva, urine). The trends construction base MIP combine materials such carbonaceous materials, metal nanoparticles, improving their electrocatalytic properties analytical parameters electro-analytical developed. Glassy carbon electrodes, paste screen-printed electrodes are main transductors oxidation glucose, maximum anodic peak current taken to signal. In all reported sensors, presence improved compared bare working electrode. results demonstrated that this approach represents viable alternative fast confident analysis molecule overcoming drawbacks presented by enzymatic sensors.

Language: Английский

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A highly sensitive and selective electrochemical sensor based on polythiourea modified glassy carbon electrode for detecting fenitrothion in vegetables

International Journal of Electrochemical Science, Journal Year: 2024, Volume and Issue: 19(10), P. 100754 - 100754

Published: Aug. 10, 2024

A sensitive and selective sensor based on a polythiourea-modified glassy carbon electrode (polythiourea/GCE) was fabricated for electrochemical determination of fenitrothion (FT). Cyclic voltammetry impedance spectroscopy were used to characterize the behavior polythiourea/GCE. The chemical structural characteristics modified studied with UV-V is FTIR techniques. polythiourea (GCE) demonstrated faster electron transfer kinetics, small charge resistance, an enhanced electroactive surface area 0.173 cm2, which two times greater than that bare GCE. FT at polythiourea/GCE using cyclic square wave voltammetry. reduction followed adsorption-controlled process, interestingly, coverage determined from chronocoulometric measurements showed 3.3 higher accumulation Under optimized experimental parameters, adsorptive stripping square-wave voltammetric current signal exhibited excellent sensitivity 10.05 μA μM−1, good linearity ranging 0.05 10 µM 10–50 µM, low limits detection quantification 2.1 7.0 nM, respectively. selectivity also evaluated in presence several common interfering substances, such as nitrophenol, malathion, diazinon, ascorbic acid, K+, Mg2+, Zn2+ ions, percent error less ±5 %. practical application suggested carried out tomato, sweet potato, cabbage samples. average recoveries spiked samples between 94.3 % 110 %, indicating developed method accurate determination.

Language: Английский

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Fabrication of β-CD/SiO2@rGO/MXenes composite materials with three-dimensional structures for sensitive detection of baicalin in Chinese medicine

Diamond and Related Materials, Journal Year: 2024, Volume and Issue: 150, P. 111735 - 111735

Published: Nov. 2, 2024

Language: Английский

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Facile Electrochemical Biosensing Platform Based on Laser Induced Graphene/Laccase Electrode for the Effective Determination of Gallic Acid

Processes, Journal Year: 2023, Volume and Issue: 11(7), P. 2048 - 2048

Published: July 9, 2023

In this study, a facile electrochemical biosensing platform was fabricated with Laccase (Lac) immobilized on laser-induced graphene (LIG) electrode by glutaraldehyde covalently binding for the effective determination of gallic acid (GA). The patterned LIG prepared one-step laser direct writing polyimide film in ambient air. sheet layer and spatial mesh structures give large specific surface area good conductivity. oxygen enrichment hydrophilicity cause to favor covalent crosslinking laccase through glutaraldehyde. sensor GA determined chronoamperometry. Results show that current signals electrodes had an excellent linear relationship concentration range 0.1–20 mmol/L detection limit 0.07 under optimized experimental conditions. selectivity, regeneration, stability can be applied biological samples such as sweat, urine serum without needing sample pretreatment.

Language: Английский

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