Stripping voltammetric detection of copper ions using carbon paste electrode modified with aza-crown ether capped gold nanoparticles and reduced graphene oxide

RSC Advances ◽  
2016 ◽  
Vol 6 (92) ◽  
pp. 89167-89175 ◽  
Author(s):  
M. Ghanei-Motlagh ◽  
Ch. Karami ◽  
M. A. Taher ◽  
S. J. Hosseini-Nasab
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Crown Ether ◽  
Reduced Graphene Oxide ◽  
Copper Ions ◽  
Carbon Paste ◽  
Reduced Graphene ◽  
Voltammetric Detection ◽  
Paste Electrode ◽  
Kryptofix 21

A novel electrochemical sensor based on reduced graphene oxide (RGO) and kryptofix 21-capped gold nanoparticles (GNPs) has been proposed.

Electroanalytical Approach for Determination of Tanshinone IIA Based on Electrochemically Reduced Graphene Oxide Modified Gold Nanoparticles-Incorporated Carbon Paste Electrode

NANO ◽  
2017 ◽  
Vol 12 (01) ◽  
pp. 1750001
Author(s):  
Xiuli Zhang ◽  
Jianwei Li ◽  
Dong Wang ◽  
Huiqin Li
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Tanshinone Iia ◽  
Carbon Paste ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Paste Electrode

In this work, a novel electrochemical sensor was presented for Tanshinone IIA determination. The as-prepared electrode was prepared by electrodepositing a reduced graphene oxide film onto a carbon paste electrode modified with gold nanoparticles, which combined the advantages of both gold nanoparticles and electrochemically reduced graphene oxide. It was characterized with scanning electron microscopy and cyclic voltammetry. The electrochemical behavior of Tanshinone IIA at the modified electrode was investigated for the first time. Results revealed that the modified electrode can effectively increase response toward Tanshinone IIA by significantly enhancing the redox peak currents and decreasing the peak-to-peak separation. Under the optimized conditions, the modified electrode showed a linear voltammetric response to Tanshinone IIA at concentrations ranging from [Formula: see text][Formula: see text]mol L[Formula: see text] to [Formula: see text][Formula: see text]mol L[Formula: see text], with a detection limit of [Formula: see text][Formula: see text]mol L[Formula: see text] ([Formula: see text]). The proposed method was successfully applied in determination of Tanshinone IIA in pharmaceutical samples with satisfactory results.

scholarly journals A Novel Reduced Graphene Oxide Modified Carbon Paste Electrode for Potentiometric Determination of Trihexyphenidyl Hydrochloride in Pharmaceutical and Biological Matrices

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 2955
Author(s):  
Josip Radić ◽  
Maša Buljac ◽  
Boštjan Genorio ◽  
Ema Gričar ◽  
Mitja Kolar
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Paste Electrode ◽  
Anticholinergic Drug ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Experimental Conditions ◽  
Electroactive Material ◽  
Reduced Graphene ◽  
Paste Electrode

A novel promising carbon paste electrode with excellent potentiometric properties was prepared for the analysis of trihexyphenidyl hydrochloride (THP), the acetylcholine receptor and an anticholinergic drug in real samples. It contains 10.2% trihexyphenidy-tetraphenylborate ionic pair as the electroactive material, with the addition of 3.9% reduced graphene oxide and 0.3% of anionic additive into the paste, which consists of 45.0% dibutylphthalate as the solvent mediator and 40.6% graphite. Under the optimized experimental conditions, the electrode showed a Nernstian slope of 58.9 ± 0.2 mV/decade with a regression coefficient of 0.9992. It exhibited high selectivity and reproducibility as well as a fast and linear dynamic response range from 4.0 × 10−7 to 1.0 × 10−2 M. The electrode remained usable for up to 19 days. Analytical applications showed excellent recoveries ranging from 96.8 to 101.7%, LOD was 2.5 × 10−7 M. The electrode was successfully used for THP analysis of pharmaceutical and biological samples.

A novel sensor for sensitive determination of atropine based on a Co3O4-reduced graphene oxide modified carbon paste electrode

2015 ◽  
Vol 39 (5) ◽  
pp. 3875-3881 ◽  
Author(s):  
Hasan Bagheri ◽  
Seyedeh Maryam Arab ◽  
Hosein Khoshsafar ◽  
Abbas Afkhami
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Paste Electrode ◽  
Electrochemical Determination ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Reduced Graphene ◽  
Sensitive Determination ◽  
Paste Electrode

Co3O4-reduced graphene oxide acted as a selective and sensitive modifier in a sensing layer for electrochemical determination of atropine.

Investigation of Electrochemical Oxidation of Methanol at a Carbon Paste Electrode Modified with Ni(II)-BS Complex and Reduced Graphene Oxide Nano Sheets

2016 ◽  
Vol 28 (12) ◽  
pp. 2985-2992 ◽  
Author(s):  
Zeinab Mousavi ◽  
Ali Benvidi ◽  
Shahriar Jahanbani ◽  
Mohammad Mazloum-Ardakani ◽  
Rasoul Vafazadeh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrochemical Oxidation ◽  
Carbon Paste Electrode ◽  
Carbon Paste ◽  
Oxidation Of Methanol ◽  
Reduced Graphene ◽  
Paste Electrode
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