Impedimetric and stripping voltammetric determination of methamphetamine at gold nanoparticles-multiwalled carbon nanotubes modified screen printed electrode

Rafiee, Banafsheh; Fakhari, Ali Reza; Ghaffarzadeh, Mohammad

doi:10.1016/j.snb.2015.03.077

Cited by 41 publications

(18 citation statements)

References 63 publications

(70 reference statements)

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“…The LOD compares favourably with that obtained using indirect electrochemistry with 1,2-naphthoquinone-4-sulfonate [ 16 ], and it is considerably higher than the LODs obtained using direct electrochemical methods [ 13 – 15 ], although all these methods use aqueous solution and not undiluted saliva. Use of microelectrodes should provide greater sensitivity of response, since increased mass transport of MAMP to the electrode should result in increased peak heights i.e.…”

Section: Resultsmentioning

confidence: 86%

“…There are only a few reports of the electrochemical sensing of amphetamines, and there are no reports of the determination of amphetamines in undiluted saliva using disposable electrochemical sensors. Electrochemical sensing of methamphetamine by direct oxidation has been reported at a pretreated pencil graphite electrode [LOD 50 nM (7.5 ng/mL) in aqueous solution, response time >10 min] [ 13 ], at a self-assembled boron-doped diamond electrode [LOD 50 nM (7.5 ng/mL) in aqueous solution, response time not given] [ 14 ], and in alkaline solution using a gold nanoparticle-multiwalled carbon nanotube modified screen printed electrode [LOD 0.3 nM (0.05 ng/mL), response time not given] [ 15 ]. The indirect electrochemical detection of amphetamine in saliva has been reported using 1,2-naphthoquinone-4-sulfonate at an edge plane pyrolytic graphite electrode [LOD 41 μM (6.2 μg/mL) in aqueous solution, response time not given] [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Disposable screen printed sensor for the electrochemical detection of methamphetamine in undiluted saliva

Bartlett¹,

Taylor²,

Fernandez³

et al. 2016

Chemistry Central Journal

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BackgroundMethamphetamine has an adverse effect on the ability to drive safely. Police need to quickly screen potentially impaired drivers therefore a rapid disposable test for methamphetamine is highly desirable. This is the first proof-of-concept report of a disposable electrochemical test for methamphetamine in undiluted saliva.ResultsA screen printed carbon electrode is used for the N,N′-(1,4-phenylene)-dibenzenesulfonamide mediated detection of methamphetamine in saliva buffer and saliva. The oxidized mediator reacts with methamphetamine to give an electrochemically active adduct which can undergo electrochemical reduction. Galvanostatic oxidation in combination with a double square wave reduction technique resulted in detection of methamphetamine in undiluted saliva with a response time of 55 s and lower detection limit of 400 ng/mL.ConclusionsUsing a double square wave voltammetry technique, rapid detection of methamphetamine in undiluted saliva can be achieved, however there is significant donor variation in response and the detection limit is significantly higher than desired. Further optimization of the assay and sensor format is required to improve the detection limit and reduce donor effects.Electronic supplementary materialThe online version of this article (doi:10.1186/s13065-016-0147-2) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Disposable screen printed sensor for the electrochemical detection of methamphetamine in undiluted saliva

Bartlett¹,

Taylor²,

Fernandez³

et al. 2016

Chemistry Central Journal

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“…The screen printed electrodes (SPE) are simple, low cost, portable, small sized and capable of mass production [15]. The reduced size of the SPEs lowers the sample volume down to 30-40 L, which is advantageous especially in the analysis of biological samples and can be easily integrate in miniaturized portable devices [16]. The SPEs are very versatile since the composition of the printing inks could be modified with several substances such as metals, enzymes, polymers or complexing agents [17].…”

Section: Introductionmentioning

confidence: 99%

Molecularly imprinted electrochemical sensor prepared on a screen printed carbon electrode for naloxone detection

Lopes

Pacheco

Rebelo

et al. 2017

Sensors and Actuators B: Chemical

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Naloxone (NLX) is a pharmaceutical used as opioid antagonist. A molecular imprinted polymer electrochemical sensor for simple and rapid detection of NLX was prepared through the modification of commercial available screen printed carbon electrode (SPCE). The SPCE was modified with multi-walled carbon nanotubes (MWCNT) by drop coating to increase the signal response and improve the sensitivity. The MIP preparation was carried out via in situ electropolymerization using 4-aminobenzoic acid (4-ABA) as functional monomer. The morphology of the obtained sensor was characterized by scanning electron microscopy (SEM). Several parameters controlling the preparation and performance of the MIP sensor were studied and optimized. The electrochemical behavior of NLX at MIP and control nonimprinted (NIP) sensor was evaluated by differential pulse voltammetry (DPV), demonstrating a better MIP response and the success of the imprinting. The proposed MIP/MWCNT/SPCE sensor showed a linear relationship between peak current intensity and NLX concentration in the range between 0.25 and 10.0 M, with limits of detection (LOD) and quantification (LOQ) of 0.20 M and 0.67 M respectively. The repeatability and reproducibility were also tested with relative standard deviations (RSD) of 4.6 and 9.6% respectively. Moreover, the applicability of the method was successfully confirmed with detection of NLX in biological samples (urine and human serum). The sensor is promising to be used for screening NLX in point-of-care people with opioid overdose.

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“…The energy transfer coefficient α for the bare and MWCNT-modified GCE was 0.47 and 0.07, respectively, and for various concentrations of Au(NP)-MWCNT-modified GCEs, it was found in the range from 0.15 to 0.22. Ideally, α varies from 0 to 1 and classifies the type of reaction, 52 that is, irreversible if α is close to 0; reversible if it is close to 1; and quasi-reversible in case α is close to 0.5. It was observed that in the present case, the reaction was quasi-reversible for the bare GCE, became irreversible for MWCNT-modified GCE, but for Au(NP)-MWCNT nanohybrid-modified GCE, reaction again became quasi-reversible.…”

Section: Effect Of Scan Ratementioning

confidence: 99%

Role of Au(NPs) in the enhanced response of Au(NPs)-decorated MWCNT electrochemical biosensor

Mehmood

Ciancio

Carlino

et al. 2018

IJN

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BackgroundThe combination of Au-metallic-NPs and CNTs are a new class of hybrid nanomaterials for the development of electrochemical biosensor. Concentration of Au(nanoparticles [NPs]) in the electrochemical biosensor is crucial for the efficient charge transfer between the Au-NPs-MWCNTs modified electrode and electrolytic solution.MethodsIn this work, the charge transfer kinetics in the glassy carbon electrode (GCE) modified with Au(NPs)–multiwalled carbon nanotube (MWCNT) nanohybrid with varied concentrations of Au(NPs) in the range 40–100 nM was studied using electrochemical impedance spectroscopy (EIS). Field emission scanning electron microscopy and transmission electron microscopy confirmed the attachment of Au(NPs) on the surface of MWCNTs.ResultsThe cyclic voltammetry and EIS results showed that the charge transfer mechanism was diffusion controlled and the rate of charge transfer was dependent on the concentration of Au(NPs) in the nanohybrid. The formation of spherical diffusion zone, which was dependent on the concentration of Au(NPs) in nanohybrids, was attributed to result in 3 times the increase in the charge transfer rate ks, 5 times increase in mass transfer, and 5% (9%) increase in Ipa (Ipc) observed in cyclic voltammetry in 80 nM Au(NP) nanohybrid-modified GCE from MWCNT-modified GCE. The work was extended to probe the effect of charge transfer rates at various concentrations of Au(NPs) in the nanohybrid-modified electrodes in the presence of Escherichia coli. The cyclic voltammetry results clearly showed the best results for 80 nM Au(NPs) in nanohybrid electrode.ConclusionThe present study suggested that the formation of spherical diffusion zone in nanohybrid-modified electrodes is critical for the enhanced electrochemical biosensing applications.

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Impedimetric and stripping voltammetric determination of methamphetamine at gold nanoparticles-multiwalled carbon nanotubes modified screen printed electrode

Cited by 41 publications

References 63 publications

Disposable screen printed sensor for the electrochemical detection of methamphetamine in undiluted saliva

Disposable screen printed sensor for the electrochemical detection of methamphetamine in undiluted saliva

Molecularly imprinted electrochemical sensor prepared on a screen printed carbon electrode for naloxone detection

Role of Au(NPs) in the enhanced response of Au(NPs)-decorated MWCNT electrochemical biosensor

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