Selective and Simultaneous Determination of Dihydroxybenzene Isomers Based on Green Synthesized Gold Nanoparticles Decorated Reduced Graphene Oxide

2015 ◽  
Vol 27 (5) ◽  
pp. 1144-1151 ◽  
Author(s):  
Selvakumar Palanisamy ◽  
Chelladurai Karuppiah ◽  
Shen-Ming Chen ◽  
K. Muthupandi ◽  
R. Emmanuel ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Dihydroxybenzene Isomers ◽  
Reduced Graphene

Simultaneous determination of dihydroxybenzene isomers using a three-dimensional over-oxidized polypyrrole–reduced graphene oxide composite film electrode prepared by an electrochemical method

2020 ◽  
Vol 44 (46) ◽  
pp. 20294-20302
Author(s):  
Kai-li Song ◽  
Rui Li ◽  
Kun Li ◽  
Hao Yu
Keyword(s):  
Graphene Oxide ◽  
Composite Film ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Electrochemical Method ◽  
Three Dimensional ◽  
Dihydroxybenzene Isomers ◽  
Oxide Composite ◽  
Reduced Graphene

A 3D-over-oxidized polypyrrole–reduced graphene oxide composite film was prepared by an electrochemical procedure, which showed high electrochemical activity and good selectivity for simultaneous determination of dihydroxybenzene isomers.

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.

Simultaneous determination of Cd(II) and Pb(II) using electrode modified by FeAl2O4-AlOOH-reduced graphene oxide hybrids

Ionics ◽  
2018 ◽  
Vol 25 (5) ◽  
pp. 2351-2360 ◽  
Author(s):  
Fan Bai ◽  
Qun Li ◽  
Tao Yang ◽  
Junhong Chen ◽  
Xinmei Hou
Keyword(s):  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene

scholarly journals Reduced Graphene Oxide/Gold Nanoparticles Modified Screen-Printed Electrode for the Determination of Palmitic Acid

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Chin Boon Ching ◽  
Jaafar Abdullah ◽  
Nor Azah Yusof
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Palmitic Acid ◽  
Reduced Graphene Oxide ◽  
Palm Oil ◽  
Water Mixture ◽  
Reduced Graphene ◽  
Electrochemical Approach ◽  
Screen Printed

Palm oil is one of the major oils and fats produced in the world today. The quality of palm oil is crucial to be investigated, and one of the quality indices is free fatty acid (FFA) content. Therefore, in this study, an electrochemical approach for the determination of FFA has been explored as an alternative to replace the conventional method (titration method). The electrochemical method was developed based on electrochemically reduced graphene oxide (rGO) coupled with gold nanoparticles (AuNPs) deposited onto a screen-printed carbon electrode (SPCE) via drop-casting technique. The voltammetric behaviour of 2-methyl-1,4-naphthoquinone (VK3) in the presence of palmitic acid at the modified electrode was investigated in an acetonitrile/water mixture containing lithium perchlorate (LiClO4). The electrochemical detection of palmitic acid was based on the voltammetric reduction of VK3 to form the corresponding hydroquinone which is proportional to the concentration of palmitic acid. Under optimum conditions, the developed method showed a good linear relationship towards palmitic acid in the concentration ranging from 0.192 mM to 0.833 mM with the detection limit of 0.015 mM. The exploration of the developed system is expected to achieve high sensitivity and excellent selectivity towards the determination of FFA content in palm oil.

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