A novel electrochemical sensor for non-ergoline dopamine agonist pramipexole based on electrochemically reduced graphene oxide nanoribbons

2015 ◽  
Vol 7 (9) ◽  
pp. 3912-3919 ◽  
Author(s):  
Prashanth S. Narayana ◽  
Nagappa L. Teradal ◽  
J. Seetharamappa ◽  
Ashis K. Satpati
Keyword(s):  
Graphene Oxide ◽  
Dopamine Agonist ◽  
Biological Fluids ◽  
Pharmaceutical Formulations ◽  
Electrochemical Sensing ◽  
Graphene Oxide Nanoribbons ◽  
Sensing Platform ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

A facile and feasible electrochemical sensing platform based on graphene oxide nanoribbons for electrochemical investigations and determination of a non-ergoline dopamine agonist in pharmaceutical formulations and biological fluids.

scholarly journals A Robust Electrochemical Sensor for Determination of ThiamethoxamBased on Electrochemical Reduced Graphene Oxide-Cationic Pillar[6]arene Composite Film

2021 ◽  
Author(s):  
Yanju Wu ◽  
Zikang Li ◽  
Dongyang Han ◽  
Qunpeng Duan ◽  
Fei Wang
Keyword(s):  
Graphene Oxide ◽  
Composite Film ◽  
Reduced Graphene Oxide ◽  
Differential Pulse ◽  
Potential Method ◽  
Electrochemical Sensing ◽  
Sensing Platform ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

Abstract On the surface of a glassy carbon electrode, electrochemically reduced graphene oxide-cationic pillar[6]arene (ErGO-CP6) composite film was constructed using a pulsed potential method. UV-vis spectra, SEM, Raman spectra and electrochemical experiments were applied to characterize the composite film. It was then used as a new electrochemical sensing platform for determination of thiamethoxam. Due to the synergistic effect of ErGO and CP6, this composite film shows a higher sensitivity and better selectivity toward thiamethoxam than that of ErGO film. The linear range from 1.0 × 10-7 to 1.3 × 10-5 mol L-1 was obtained by differential pulse voltammetry. Meanwhile, the method was applied to cucumber and tomato samples in a recovery test. The recovery was between 92.0% and 98.7%, and the results are satisfactory. This study presents a promising electrochemical sensing platform for rapid and sensitive analysis of thiamethoxam.

scholarly journals An electrochemical sensor based on copper-based metal–organic framework-reduced graphene oxide composites for determination of 2,4-dichlorophenol in water

RSC Advances ◽  
2020 ◽  
Vol 10 (69) ◽  
pp. 42212-42220
Author(s):  
Manh B. Nguyen ◽  
Vu Thi Hong Nhung ◽  
Vu Thi Thu ◽  
Dau Thi Ngoc Nga ◽  
Thuan Nguyen Pham Truong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Reduced Graphene Oxide ◽  
Metal Organic Framework ◽  
Electrochemical Sensing ◽  
Sensing Platform ◽  
Reduced Graphene ◽  
Metal Organic ◽  
Oxide Composites

In the present work, we reported the fabrication of a novel electrochemical sensing platform to detect 2,4-dichlorophenol (2,4-DCP) by using a copper benzene-1,3,5-tricarboxylate–graphene oxide (Cu–BTC/GO) composite.

scholarly journals Highly sensitive determination of non-steroidal anti-inflammatory drug nimesulide using electrochemically reduced graphene oxide nanoribbons

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 33043-33051 ◽  
Author(s):  
Mani Govindasamy ◽  
Veerappan Mani ◽  
Shen-Ming Chen ◽  
Thandavarayan Maiyalagan ◽  
S. Selvaraj ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Electrode ◽  
Graphene Oxide Nanoribbons ◽  
Screen Printed Carbon Electrode ◽  
Reduced Graphene ◽  
Highly Sensitive ◽  
Electrochemically Reduced Graphene Oxide ◽  
Sensitive Determination

Preparation of an electrochemically reduced graphene nanoribbon (ER-GONR) film modified screen-printed carbon electrode for the highly sensitive determination of nimesulide.

Development of a Novel Nanocomposite Based on Reduced Graphene Oxide/Chitosan/Au/ZnO and Electrochemical Sensor for Determination of Losartan

2020 ◽  
Vol 16 (8) ◽  
pp. 996-1009
Author(s):  
Khadijeh Ghanbari ◽  
Ashraf Sivandi
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Biological Fluids ◽  
High Sensitivity ◽  
Pharmaceutical Formulations ◽  
X Ray ◽  
Reduced Graphene ◽  
Ft Ir

Background: Hypertension is a major risk for morbidity and mortality, while hypertension is associated with cardiovascular disease and organ damage. Recent research efforts have focused on the development of highly selective angiotensin receptor blockers. In which losartan (LOS) is considered as a new generation of an effective oral drug product against arterial hypertension. Therefore, the determination of drugs in biological fluids, pharmaceuticals (tablets), and wastewater is of critical importance for clinical applications, forensics, quality control, and environmental protection that call for the development of analytical methods. Many ranges of methods such as spectroscopic methods and chromatographic techniques have been developed to determine LOS in pharmaceutical formulations and biological fluids. However, there are crucial interference problems in these methods. For these reasons, more sensitive, desirable, portable, low-cost, simple, and selective nanocomposite-based sensors are needed in terms of health safety. Nanomaterials such as reduced graphene oxide, chitosan, and metal nanoparticles are used to improve the sensitivity in the development of electrochemical sensors. Objective: In this study, a novel reduced graphene oxide (RGO), chitosan (Chit), gold (Au), and zinc oxide (ZnO) nanocomposite (RGO/Chitosan/Au/ZnO) was synthesized and used to develop a sensitive and efficient electrochemical sensor for LOS detection. Methods: Modification of electrode by RGO/Chit/Au/ZnO nanocomposite was performed in four stages with GO (at -2.0 V for 150 s), Chitosan (at -3.0 V for 300 s), Au nanoparticles (at -0.4 V for 400 s), and Zn nanoflowers like (at -0.7 V for 1200 s). The RGO/Chitosan/Au/ZnO nanocomposite was characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR). Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) were used to detect LOS, and the influence of pH value, scan rate, accumulation potential, and time also losartan concentration on the performance of ZnO/Au/Chitosan/RGO/GCE were investigated. In order to investigate the selectivity of the modified electrode for the determination of LOS, the effect of possible interfering species was evaluated and showed that these species are not interferences. Also, the reproducibility of the modified electrode was investigated and implying that the RGO/Chit/Au/ZnO nanocomposite was highly reproducible. Results: The modified electrode was used as a sensor for the selective and sensitive determination of LOS with a detection limit of 0.073 μM over the dynamic linear range of 0.5μM to 18.0 μM. In addition, electrochemical oxidation of LOS was well recovered in pharmaceutical formulations. Conclusion: LOS is used to treat high blood pressure, taking into account the oxidation of this compound, the use of electrochemical based sensors, ideally suited to a specific chemical species, can be fully selectable and High-sensitivity answer is very important. In this study, the electrodes with RGO/Chit/Au/ZnO nanocomposite were modified by the electrochemical method. Nanocomposites were characterized by various methods such as FE-SEM, FT-IR, XRD, Raman, and XPS. The electrocatalytic activity of the modified electrode was then investigated for measuring LOS. According to the results of the modified electrode, high sensitivity, reproducibility, and selectivity have been shown to oxidize this composition.

A sensitive impedimetric DNA biosensor for the determination of the HIV gene based on electrochemically reduced graphene oxide

2015 ◽  
Vol 7 (6) ◽  
pp. 2554-2562 ◽  
Author(s):  
Qiaojuan Gong ◽  
Haiying Yang ◽  
Yanyun Dong ◽  
Wenchan Zhang
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Dna Biosensor ◽  
Sensing Platform ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

A sensitive impedimetric DNA biosensor for the determination of the HIV gene was developed by employing electrochemically reduced graphene oxide as a sensing platform.

An electrochemical sensing platform of cobalt oxide@gold nanocubes interleaved reduced graphene oxide for the selective determination of hydrazine

2018 ◽  
Vol 259 ◽  
pp. 606-616 ◽  
Author(s):  
Muhammad Mehmood Shahid ◽  
Perumal Rameshkumar ◽  
Wan Jeffrey Basirunc ◽  
Upul Wijayantha ◽  
Wee Siong Chiu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Cobalt Oxide ◽  
Electrochemical Sensing ◽  
Selective Determination ◽  
Sensing Platform ◽  
Reduced Graphene

scholarly journals Simultaneous Determination of Uric Acid and Xanthine Using a Poly(Methylene Blue) and Electrochemically Reduced Graphene Oxide Composite Film Modified Electrode

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Gen Liu ◽  
Wei Ma ◽  
Yan Luo ◽  
Deng-ming Sun ◽  
Shuang Shao
Keyword(s):  
Methylene Blue ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

Poly(methylene blue) and electrochemically reduced graphene oxide composite film modified electrode (PMB-ERGO/GCE) was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid (UA) and xanthine (Xa). Based on the excellent electrocatalytic activity of PMB-ERGO/GCE, the electrochemical behaviors of UA and Xa were studied by cyclic voltammetry (CV) and square wave voltammetry (SWV). Two anodic sensitive peaks at 0.630 V (versus Ag/AgCl) for UA and 1.006 V (versus Ag/AgCl) for Xa were given by CV in pH 3.0 phosphate buffer. The calibration curves for UA and Xa were obtained in the range of 8.00 × 10−8~4.00 × 10−4 M and 1.00 × 10−7~4.00 × 10−4 M, respectively, by SWV. The detection limits for UA and Xa were3.00×10-8 M and5.00×10-8 M, respectively. Finally, the proposed method was applied to simultaneously determine UA and Xa in human urine with good selectivity and high sensitivity.

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