Voltammetric sensing of paracetamol, dopamine and 4-aminophenol at a glassy carbon electrode coated with gold nanoparticles and an organophillic layered double hydroxide

Yin, Huanshun; Shang, Kun; Meng, Xiaomeng; Ai, Shiyun

doi:10.1007/s00604-011-0652-x

Cited by 85 publications

(32 citation statements)

References 35 publications

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“…Up to now, several methods have been developed for detection of DA and AC, including capillary electrophoresis [10], chromatography [11], chemiluminescence [12], spectrophotometric [13], and electrochemical method [14,15]. Among them, electrochemical methods are widely used, owing to their intrinsic advantages such as rapid response, high sensitivity, easy operation, and low cost.…”

Section: Introductionmentioning

confidence: 99%

A glassy carbon electrode modified with porous gold nanosheets for simultaneous determination of dopamine and acetaminophen

et al. 2014

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Porous gold nanosheets modified glassy carbon electrode (GCE) was facilely prepared by one-step electrodeposition, using N-methylimidazole as a growth-directing agent. The porous gold nanosheets modified GCE was characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction spectroscopy. The modified electrode displayed improved sensitivity for individual and simultaneous differential pulse voltammetric determination of dopamine (DA; at 180 mV) and acetaminophen (AC; at 450 mV vs. Ag/AgCl) even in the presence of ascorbic acid. The oxidation peak currents linearly increased with the concentrations of DA and AC in the ranges from 2.0 to 298.0 μM and 3.0 to 320.0 μM, respectively, and the detection limits are 0.28 μM for DA and 0.23 μM for AC. The relative standard deviations (n=20) are 1.5 % for DA and 0.4 % for AC.

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Section: Introductionmentioning

confidence: 99%

A glassy carbon electrode modified with porous gold nanosheets for simultaneous determination of dopamine and acetaminophen

et al. 2014

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“…In recent years, chemically modified electrodes (CMEs) have become important electrochemical detection methods for the determination of biologically important compounds because of its good sensitivity, selectivity and stability [7][8][9]. There have been many reports on the application of CMEs for the selective determination of DA and UA in the presence of high concentration of AA [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Among them, polymer modified electrodes prepared by electropolymerization method have received extensive interest because chemically stable homogeneous film with controlled thickness can be prepared by this method.…”

Section: Introductionmentioning

confidence: 99%

Glassy carbon electrode modified with poly(dibromofluorescein) for the selective determination of dopamine and uric acid in the presence of ascorbic acid

Wang

Yan

2012

Microchim Acta

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We are presenting an electrochemical sensor for the simultaneous determination of dopamine (DA) and uric acid (UA) in the presence of even high concentrations of ascorbic acid (AA). It based on a glassy carbon electrode modified with an electroactive film of polymerized dibromofluorescein. The electrochemical behaviors of DA and UA were studied by cyclic voltammetry using the modified electrode. It exhibits excellent electrocatalytic activity towards the oxidation of the two analytes. Most notably, the oxidation potentials differ by 180 and 200 mV between AA-DA and DA-UA, respectively. Thus, excellent selectivity towards the oxidation of DA and UA in the presence of even high concentrations of AA is accomplished. Under the optimum conditions, the anodic peak currents are linearly related to the concentrations of DA and UA in the range from 0.2 to 200 μmol L -1 and from 1.0 to 250 μmol L -1 , respectively. The detection limits for DA and UA are 0.03 μmol L -1 and 0.2 μmol L -1 , respectively (at an S/N of 3). The method has good selectivity and sensitivity and was successfully applied to the simultaneous determination of DA and UA in spiked human serum.

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“…However, the irreversibility of DA's electrochemistry on conventional electrodes is poor, and the oxidation products always foul the electrode surface, thus, using conventional electrodes for detection of DA generally gives poor results. Toward a general solution to these problems, various materials with excellent electrocatalytic activities have been used to modify electrode for the detection of DA, such as metal nanoparticles [4,5], conductive polymers [6,7], and carbon based nanomaterials [8,9].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis of a graphene sheet and gold nanoparticle-based nanocomposite, and its application to amperometric sensing of dopamine

Deng

Shi

et al. 2012

Microchim Acta

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We describe a simple, green and controllable approach for electrochemical synthesis of a nanocomposite made up from electrochemically reduced graphene oxide (ERGO) and gold nanoparticles. This material possesses the specific features of both gold nanoparticles and graphene. Its morphology was characterized by scanning electron microscopy which reveals a homogeneous distribution of gold nanoparticles on the graphene sheets. Cyclic voltammetry was used to evaluate the electrochemical properties of this nanocomposite towards dopamine by modification of it on surface of glassy carbon electrode (GCE). Compared to the bare GCE, the electrode modified with gold nanoparticles, and the electrode modified with ERGO, the one modified with the nanocomposite displays better electrocatalytic activity. Its oxidation peak current is linearly proportional to the concentration of dopamine (DA) in the range from 0.1 to 10 μM, with a detection limit of 0.04 μM (at S/N03). The modified electrode also displays good storage stability, reproducibility, and selectivity.

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Voltammetric sensing of paracetamol, dopamine and 4-aminophenol at a glassy carbon electrode coated with gold nanoparticles and an organophillic layered double hydroxide

Cited by 85 publications

References 35 publications

A glassy carbon electrode modified with porous gold nanosheets for simultaneous determination of dopamine and acetaminophen

A glassy carbon electrode modified with porous gold nanosheets for simultaneous determination of dopamine and acetaminophen

Glassy carbon electrode modified with poly(dibromofluorescein) for the selective determination of dopamine and uric acid in the presence of ascorbic acid

Electrochemical synthesis of a graphene sheet and gold nanoparticle-based nanocomposite, and its application to amperometric sensing of dopamine

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