Voltammetric determination of dopamine in the presence of tyrosine using graphite screen-printed electrode modified with graphene quantum dots

Beitollahi, Hadi; Dourandish, Zahra; Ganjali, Mohammad Reza; Shakeri, Shahryar

doi:10.1007/s11581-018-2489-3

Cited by 34 publications

(10 citation statements)

References 57 publications

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“…Furthermore, diffusion coefficients with the use of the chronoamperometry at the modied electrode surface have been obtained respectively as 6.4 Â 10 À5 cm 2 s À1 and 9.0 Â 10 À5 cm 2 s À1 for Tyr and DA. 150 In 2017, Tashkhourian et al also combined GQDs and chitosan as a stabilizer in a carbon paste electrode (CPE) with an aim of voltammetric determination of EP. The EIS and CV demonstrated fast electron transfer for the prepared GQD-CS-CPE compared to the bare electrode and an appropriate electrocatalytic activity to electro oxidizes EP.…”

Section: Applications Of Cqds and Gqdsmentioning

confidence: 99%

Carbon and graphene quantum dots: a review on syntheses, characterization, biological and sensing applications for neurotransmitter determination

et al. 2020

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Section: Applications Of Cqds and Gqdsmentioning

confidence: 99%

Carbon and graphene quantum dots: a review on syntheses, characterization, biological and sensing applications for neurotransmitter determination

et al. 2020

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“…The electrochemical oxidation of these two compounds involves two protons and two electrons. Based on this, Supporting Information presents the suggested mechanism for the oxidation of DOPA and AC .…”

Section: Resultsmentioning

confidence: 99%

“…Based on this, Supporting Information Fig. S3 presents the suggested mechanism for the oxidation of DOPA and AC [40][41][42].…”

Section: Influence Of the Phmentioning

confidence: 99%

Design of novel, simple, and inexpensive 3D printing‐based miniaturized electrochemical platform containing embedded disposable detector for analytical applications

et al. 2019

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This paper describes the development of a novel, simple, and inexpensive electrochemical device containing an integrated and disposable three‐electrode system for detection. The base of this platform consists on a PDMS structure containing microchannels which were prototyped using 3D‐printed molds. Pencil graphite leads were inserted into these microchannels and utilized as working, counter and reference electrodes in a novel design. Morphological analysis and electrochemical experiments with benchmark redox probes were carried out in order to evaluate the performance and characterize the miniaturized device proposed. Even using inexpensive materials and a simple fabrication protocol, the electrochemical platform developed provided good repeatability and reproducibility over a low cost (ca. $2 per device), acceptable lifetime (ca. 250 voltammetric runs) and extremely reduced consumption of samples and reagents (order of µL). As proof of concept, the analytical feasibility of the platform was investigated through the simultaneous determination of dopamine (DOPA) and acetaminophen (AC). The two analytes showed linear dependence on the concentration range from 1 to 15 µM and the LODs achieved were 0.21 µM for DOPA and 0.29 µM for AC. Moreover, the platform was successfully applied on the determination of DOPA and AC in spiked blood serum and urine samples. The results obtained with the device described here were better than some reports in literature that use more costly electrodic materials and complex modification steps for the detection of the same analytes.

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“…The modified electrode was designated CS/N-GQDs/SPCE. The other carbon-based QD-modified SPCE was fabricated by Beitollahi et al in 2018 [119]. Therein, GQDs prepared through the pyrolysis of citric acid in a ceramic crucible were dispersed in water, ultrasonicated for 30 min and subsequently cast on SPCE.…”

Section: Modification Of Screen-printed Electrodesmentioning

confidence: 99%

Carbon-Based Quantum Dots for Electrochemical Detection of Monoamine Neurotransmitters—Review

et al. 2020

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Imbalance in the levels of monoamine neurotransmitters have manifested in severe health issues. Electrochemical sensors have been designed for their determination, with good sensitivity recorded. Carbon-based quantum dots have proven to be an important component of electrochemical sensors due to their high conductivity, low cytotoxicity and opto-electronic properties. The quest for more sensitive electrodes with cheaper materials led to the development of electrochemical sensors based on carbon-based quantum dots for the detection of neurotransmitters. The importance of monoamine neurotransmitters (NTs) and the good electrocatalytic activity of carbon and graphene quantum dots (CQDs and GQDs) make the review of the efforts made in the design of such sensors for monoamine NTs of huge necessity. The differences and the similarities between these two quantum dots are highlighted prior to a discussion of their application in electrochemical sensors over the last ten years. Compared to other monoamine NTs, dopamine (DA) was the most studied with GQDs and CQD-based electrochemical sensors.

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Voltammetric determination of dopamine in the presence of tyrosine using graphite screen-printed electrode modified with graphene quantum dots

Cited by 34 publications

References 57 publications

Carbon and graphene quantum dots: a review on syntheses, characterization, biological and sensing applications for neurotransmitter determination

Carbon and graphene quantum dots: a review on syntheses, characterization, biological and sensing applications for neurotransmitter determination

Design of novel, simple, and inexpensive 3D printing‐based miniaturized electrochemical platform containing embedded disposable detector for analytical applications

Carbon-Based Quantum Dots for Electrochemical Detection of Monoamine Neurotransmitters—Review

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