scholarly journals Voltammetric Determination of Trace Zn(II) in Seawater on a Poly(sodium 4-styrenesulfonate)/Wrinkled Reduced Graphene Oxide Composite Modified Electrode

2020 ◽  
Vol 167 (4) ◽  
pp. 046519 ◽  
Author(s):  
Su Ma ◽  
Hong Wei ◽  
Dawei Pan ◽  
Fei Pan ◽  
Chenchen Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Voltammetric Determination ◽  
Oxide Composite ◽  
Reduced Graphene

Voltammetric determination of bisphenol A with a silver-reduced graphene oxide composite paste microsensor

2019 ◽  
Author(s):  
Livia Alexandra Gugoasa ◽  
Raluca Ioana Stefan-van Staden ◽  
Jacobus Frederick van Staden ◽  
Maria Coros ◽  
Stela Pruneanu
Keyword(s):  
Graphene Oxide ◽  
Bisphenol A ◽  
Reduced Graphene Oxide ◽  
Voltammetric Determination ◽  
Oxide Composite ◽  
Reduced Graphene

Simultaneous Electrodeposition of Reduced Graphene Oxide/Ag Nanoparticles as a Sensitive Layer for Voltammetric Determination of Tinidazole

NANO ◽  
2017 ◽  
Vol 12 (06) ◽  
pp. 1750067 ◽  
Author(s):  
Saeed Shahrokhian ◽  
Mostafa Navabi ◽  
Rahim Mohammadi
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Electrochemical Impedance ◽  
Simple Procedure ◽  
Voltammetric Determination ◽  
Clinical Samples ◽  
Reduction Peak ◽  
Reduced Graphene

A stable composite film of silver nanoparticles (Ag NPs) decorated on reduced graphene oxide is prepared by a two-step simple procedure. The surface morphology of the modified electrode is characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. The electrochemical behavior of tinidazole (TNZ) on the surface of the modified electrode is investigated by linear sweep voltammetry and electrochemical impedance spectroscopy. The prepared composite electrode acts as a highly sensitive platform for the voltammetric determination of TNZ, leading to a significant increase in the reduction peak current of TNZ. The effects of experimental parameters such as the amount of the casted silver ions-GO mixture suspension, the electro-reduction variables, the accumulation time and potential, the scan rate and pH of the buffered solutions on the electrochemical response of TNZ are investigated. Under optimal conditions, the modified electrode showed a wide linear range for the reduction of TNZ in the range of 0.01–10[Formula: see text][Formula: see text]M with a detection limit of 3[Formula: see text]nM. Finally, the prepared electrode is successfully applied for the determination of TNZ in pharmaceutical and clinical samples.

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.

Hexammine cobalt(iii) coordination complex grafted reduced graphene oxide composite for sensitive and selective electrochemical determination of morin in fruit samples

2018 ◽  
Vol 5 (5) ◽  
pp. 1145-1155 ◽  
Author(s):  
Thangavelu Kokulnathan ◽  
Subramanian Sakthinathan ◽  
Shen-Ming Chen ◽  
Raj Karthik ◽  
Te-Wei Chiu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrochemical Detection ◽  
Electrochemical Determination ◽  
Coordination Complex ◽  
Oxide Composite ◽  
Reduced Graphene ◽  
Fruit Samples

The RGO/[Co(NH3)6]3+/GCE modified GCE was potentially applied for the electrochemical detection of MR.

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