Preparation, characterization and electrochemical application of Ag–ZnO nanoplates for voltammetric determination of glutathione and tryptophan using modified carbon paste electrode

Beitollahi, Hadi; Gholami, Abbas

doi:10.1016/j.msec.2015.07.034

Cited by 89 publications

(20 citation statements)

References 52 publications

(43 reference statements)

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“…It has been proved that electrochemical methods, compared with other methods, are very simple, sensitive, cost‐effective and rapid. These methods are advantageous for the determination of organic compounds that are involved in redox reactions such as medicines, various chemical compounds and specific moieties in biological fluids …”

Section: Introductionmentioning

confidence: 99%

Application of a nanostructured sensor based on graphene‐ and ethyl 2‐(4‐ferrocenyl[1,2,3]triazol‐1‐yl)acetate‐modified carbon paste electrode for determination of methyldopa in the presence of phenylephrine and guaifenesin

Beitollahi

Movlaee

Ganjali

et al. 2018

Applied Organom Chemis

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We introduce a new method to determine methyldopa without the interference of phenylephrine and guaifenesin. For this purpose, a carbon paste electrode was modified with graphene and ethyl 2-(4-ferrocenyl[1,2,3]triazol-1-yl)acetate. According to electrochemical studies, oxidation current of methyldopa on the surface of the modified electrode increased and shifted towards negative potentials. This modified electrode demonstrated two linear ranges of 0.4-30.0 μM and 30.0-500.0 μM with a detection limit of 0.08 μM. No change was observed in the sensitivity of the modified electrode towards methyldopa in the presence of phenylephrine and guaifenesin, which enables the simultaneous or independent measurement of the three moieties. The efficiency of the proposed modified electrode was evaluated through the determination of these substances in real samples.

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Section: Introductionmentioning

confidence: 99%

Application of a nanostructured sensor based on graphene‐ and ethyl 2‐(4‐ferrocenyl[1,2,3]triazol‐1‐yl)acetate‐modified carbon paste electrode for determination of methyldopa in the presence of phenylephrine and guaifenesin

Beitollahi

Movlaee

Ganjali

et al. 2018

Applied Organom Chemis

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“…The relevant salts were above 2.0-9.0 pH range. Ag/ZnO nanoplates were synthesized as the procedure reported previously [49].…”

Section: Original Research Articlementioning

confidence: 99%

Voltammetric determination of zolpidem by using glassy carbon electrode modified with Ag/ZnO nanoplates

Aflatoonian

Alizadeh

Rayeni

2020

Eurasian Chem. Commun.

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Zolpidem is an imidazopyridine derivative, non-benzodiazepine and sedative-hypnotic medicine. It is a widely prescribed medication in adults used for the short-term treatment of a sleep problem called insomnia and frequent awakenings. In this work, the zolpidem was determined using Ag/ZnO nanoplates modified glassy carbon electrode (Ag-ZnO/GCE). Electrochemical behavior of the zolpidem was investigated by differential pulse voltammetry (DPV), chronoamperometry (CHA), and cyclic voltammetry (CV) using the Ag-ZnO/GCE. The results revealed that, the current responses of the zolpidem improved significantly due to the high catalytic activity and electron transfer reaction of nanoplates. The linear range of zolpidem was found to be from 0.1 µM to 500.0 µM with the detection limit of 0.03 µM. In addition, this original sensor showed numerous benefits such as reproducibility, high stability, and rapid response (20 s).

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“…the metal oxides which in turn provide further pseudo-capacitance and avoid the restacking of the sheets. [42][43][44] One of the metal oxides that can be used for preparing such composites is ZnO particles or nanoparticles which offer high electrical conductivity, high thermal stability, large band gap (3.37 eV at room temperature), high excitation binding energy (60 meV), a large isoelectric point (IEP) (∼9.5) and negligible toxicity, in addition to being widely available and cheap. [45][46][47][48][49] Given that reviewing the literature did not reveal any publications on the simultaneous electrocatalytic determination of levodopa, vitamin B6, theophylline and guaifenesin using a modified electrode, the present research was focused on developing a modified glassy carbon electrode for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Selective Determination of Levodopa in the Presence of Vitamin B6. Theophylline and Guaifenesin Using a Glassy Carbon Electrode Modified with a Composite of Hematoxylin and Graphene/ZnO

2018

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An electrode has been developed based on using a composite of hematoxylin/graphene/ZnO nanocomposite to modify a glassy carbon electrode (GCE). The electrode (HGGCE) was tested and found to be applicable for the voltammetric analysis of levodopa in the presence of vitamin B, theophylline and guaifenesin using a 0.1 M phosphate buffer solution (PBS) pH 7 as the solvent. The HGGCE was used as the working electrode in cyclic voltammetry (CV) and square wave voltammetry (SWV) studies on the electrochemical behavior of levodopa at its surface. The results showed a dramatic enhancement in the oxidation current of levodopa and a shift in its oxidation potential towards more negative potentials as opposed to identical tests using bare GCE as the working electrode. The studies showed that the increase in the oxidation current has two linear profiles in two concentration ranges of 0.05 - 90.0 and 90.0 - 1000.0 μM. The detection limit of SWV analysis using the modified electrode was determined to be 0.03 μM (S/N = 3). Further advantages of the methods based on HGGCE include the simple modification procedure of the electrode, as well as its excellent sensitivity and reproducibility. The modified electrode was eventually found to be applicable to the determination of mixtures of levodopa, vitamin B, theophylline and guaifenesin in real samples.

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Preparation, characterization and electrochemical application of Ag–ZnO nanoplates for voltammetric determination of glutathione and tryptophan using modified carbon paste electrode

Cited by 89 publications

References 52 publications

Application of a nanostructured sensor based on graphene‐ and ethyl 2‐(4‐ferrocenyl[1,2,3]triazol‐1‐yl)acetate‐modified carbon paste electrode for determination of methyldopa in the presence of phenylephrine and guaifenesin

Application of a nanostructured sensor based on graphene‐ and ethyl 2‐(4‐ferrocenyl[1,2,3]triazol‐1‐yl)acetate‐modified carbon paste electrode for determination of methyldopa in the presence of phenylephrine and guaifenesin

Voltammetric determination of zolpidem by using glassy carbon electrode modified with Ag/ZnO nanoplates

Selective Determination of Levodopa in the Presence of Vitamin B6. Theophylline and Guaifenesin Using a Glassy Carbon Electrode Modified with a Composite of Hematoxylin and Graphene/ZnO

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