Simultaneous determination of direct yellow 50, tryptophan, carbendazim, and caffeine in environmental and biological fluid samples using graphite pencil electrode modified with palladium nanoparticles

Wong, Ademar; Santos, Anderson M.; Alves, Rafael da Fonseca; Vicentini, Fernando Campanhã; Fatibello‐Filho, Orlando; Sotomayor, Marı́a Del Pilar Taboada

doi:10.1016/j.talanta.2020.121539

Cited by 37 publications

(12 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Herein, PdNPs/rGO/GCE was fabricated by facile two-step electrodeposition to detect AA, DA, and UA simultaneously. Although the preparation of PdNPs/rGO nanocomposites has been reported [ 19 – 21 ], most of them are prepared through a multistep complex process, which not only involves chemicals that may cause health and environmental risks but also contains long-time consumption. In addition to good catalytic activity and rapid response (≤5 s), the sensor prepared in this work also exhibited high reproducibility and stability.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid Using a Novel Electrochemical Sensor Based on Palladium Nanoparticles/Reduced Graphene Oxide Nanocomposite

Yuyun

Liu

et al. 2020

International Journal of Analytical Chemistry

View full text Add to dashboard Cite

A fresh strategy based on two-step electrochemical reduction for the fabrication of palladium nanoparticles/reduced oxide nanocomposite-modified glass carbon electrode (PdNPs/rGO/GCE) was established in this study. Field emission scanning electron microscopy (FESEM) images showed that spherical PdNPs were evenly distributed on the surface of rGO-modified electrode (rGO/GCE), and the introduction of PdNPs has no effect on the morphology of rGO. Electrochemical impedance spectroscopy (EIS) studies revealed that the conductivity of PdNPs/rGO/GCE was higher than that of rGO/GCE and bare GCE. The electrochemical performances of PdNPs/rGO/GCE sensor were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and chronoamperometry using ascorbic acid (AA), dopamine (DA), and uric acid (UA) as analytes. At the optimized conditions, wide linear ranges of 0.5–3.5 mM (R2 = 0.99), 3–15 μM (R2 = 0.99) and 15–42 μM (R2 = 0.99), and 0.3–1.4 mM (R2 = 0.99) towards AA, DA, and UA in ternary mixture were observed, respectively. In addition to superior anti-interference capability, fast response (≤5 s), excellent reproducibility, and good long-term stability were also given by this sensor. These results suggested that PdNPs/rGO/GCE is promising for the simultaneous detection of AA, DA, and UA in practical application.

show abstract

Section: Introductionmentioning

confidence: 99%

Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid Using a Novel Electrochemical Sensor Based on Palladium Nanoparticles/Reduced Graphene Oxide Nanocomposite

Yuyun

Liu

et al. 2020

International Journal of Analytical Chemistry

View full text Add to dashboard Cite

show abstract

“…The CBZ electrochemical reaction occurs through the deprotonation of the nitrogen atoms of the benzimidazole ring and carbamate group, forming an imine as a redox product. According to results obtained in the previous study and references reported in the literature [25,26] an oxidation mechanism was proposed for CBZ (Scheme 1) involving the transfer of two protons and two electrons.…”

Section: Optimization Of the Sensor And Analytical Parameters Of The ...mentioning

confidence: 65%

Detection of Carbendazim in Natural Waters Using a Sensor Based on Magnetite Nanoparticles Modified with Ascorbic Acid/β‐Cyclodextrin

Freitas

Vieira

2022

Electroanalysis

View full text Add to dashboard Cite

This paper describes the development of an electrochemical sensor for carbendazim detection using a glassy carbon electrode modified with a new nanomaterial obtained from the synthesis of magnetite nanoparticles stabilized with ascorbic acid and β-cyclodextrin. The nanoparticles were characterized and the sensor was evaluated by electrochemical impedance spectroscopy and square wave voltammetry. The calibration curves were linear for carbendazim concentration ranges of 3.33-13.29 μmol L À 1 and 16.61-29.82 μmol L À 1 with detection limits of 0.43 μmol L À 1 and 2.34 μmol L À 1 , respectively. The proposed sensor represents a fast, efficient and lowcost analytical tool for pesticide monitoring in natural waters.

show abstract

“…The objectives of the work by Wong et al [ 81 ] were to develop a PGE-based electrochemical sensor with palladium nanoparticles (PGE-PdNPs) and to investigate its ability to determine CF in different samples. The PGE-PdNPs had good analytical performance for the detection of CF in the presence of other compounds such as direct yellow 50, tryptophan, and carbendazim.…”

Section: Discussionmentioning

confidence: 99%

Recent Advances in Electrochemical Sensors for Caffeine Determination

Tasić

Mihajlović

Simonović

et al. 2022

Sensors

View full text Add to dashboard Cite

The determination of target analytes at very low concentrations is important for various fields such as the pharmaceutical industry, environmental protection, and the food industry. Caffeine, as a natural alkaloid, is widely consumed in various beverages and medicines. Apart from the beneficial effects for which it is used, caffeine also has negative effects, and for these reasons it is very important to determine its concentration in different mediums. Among numerous analytical techniques, electrochemical methods with appropriate sensors occupy a special place since they are efficient, fast, and entail relatively easy preparation and measurements. Electrochemical sensors based on carbon materials are very common in this type of research because they are cost-effective, have a wide potential range, and possess relative electrochemical inertness and electrocatalytic activity in various redox reactions. Additionally, these types of sensors could be modified to improve their analytical performances. The data available in the literature on the development and modification of electrochemical sensors for the determination of caffeine are summarized and discussed in this review.

show abstract

Simultaneous determination of direct yellow 50, tryptophan, carbendazim, and caffeine in environmental and biological fluid samples using graphite pencil electrode modified with palladium nanoparticles

Cited by 37 publications

References 53 publications

Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid Using a Novel Electrochemical Sensor Based on Palladium Nanoparticles/Reduced Graphene Oxide Nanocomposite

Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid Using a Novel Electrochemical Sensor Based on Palladium Nanoparticles/Reduced Graphene Oxide Nanocomposite

Detection of Carbendazim in Natural Waters Using a Sensor Based on Magnetite Nanoparticles Modified with Ascorbic Acid/β‐Cyclodextrin

Recent Advances in Electrochemical Sensors for Caffeine Determination

Contact Info

Product

Resources

About