Polystyrene/graphene composite electrode fabricated by in situ polymerization for capillary electrophoretic determination of bioactive constituents in Herba Houttuyniae

2011 ◽  
Vol 32 (14) ◽  
pp. 1906-1912 ◽  
Author(s):  
Yan Lu ◽  
Xia Wang ◽  
Daofeng Chen ◽  
Gang Chen
Keyword(s):  
Composite Electrode ◽  
In Situ Polymerization ◽  
Bioactive Constituents ◽  
Graphene Composite ◽  
Capillary Electrophoretic

Polyaniline/Graphene Composite as Supercapacitor Electrode

2012 ◽  
Vol 476-478 ◽  
pp. 1446-1449 ◽  
Author(s):  
Ming Sen Zheng ◽  
Zhi Kai Wei ◽  
Quan Feng Dong
Keyword(s):  
Electrochemical Performance ◽  
Current Density ◽  
In Situ Polymerization ◽  
Graphene Sheets ◽  
Supercapacitor Electrode ◽  
Graphene Surface ◽  
Graphene Composite ◽  
Excellent Electrochemical Performance ◽  
Polymerization Method

Polyaniline/Graphene composite (PANIGNS) was synthesized via in situ polymerization method. XRD and SEM results indicated that the polyaniline could uniformly adsorb on the graphene surface and prevent the agglomeration of the graphene sheets. The composite exhibits excellent electrochemical performance. A specific capacitance of 688F/g at current density of 1A/g was achieved in 1M KOH solution. The capacitance retention of 77.3% was acquired after 1000cycles at current density of 10A/g.

Determination of some neurotransmitters at cyclodextrin/ionic liquid crystal/graphene composite electrode

2016 ◽  
Vol 199 ◽  
pp. 319-331 ◽  
Author(s):  
Nada F. Atta ◽  
Ekram H. El-Ads ◽  
Yousef M. Ahmed ◽  
Ahmed Galal
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystal ◽  
Composite Electrode ◽  
Graphene Composite

scholarly journals In situ polymerization and FT-IR characterization of poly-glycine on pencil graphite electrode for sensitive determination of anti-emetic drug, granisetron in injections and human plasma

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4325-4335 ◽  
Author(s):  
Marwa F. B. Ali ◽  
Fatma A. M. Abdel-aal
Keyword(s):  
Human Plasma ◽  
In Situ Polymerization ◽  
Graphite Electrode ◽  
Modified Electrodes ◽  
Pencil Graphite Electrode ◽  
Ft Ir ◽  
Sensitive Determination

In situ polymerization is a simple and efficient technique for modification and fabrication of modified electrodes in voltammetry.

Far Infrared-assisted Sample Extraction and Solvent Removal for Capillary Electrophoretic Determination of the Bioactive Constituents in Citri Reticulatae Pericarpium

2020 ◽  
Vol 17 (1) ◽  
pp. 57-66
Author(s):  
Yan Zhang ◽  
Luyan Zhang ◽  
Gang Chen
Keyword(s):  
Sample Preparation ◽  
Low Cost ◽  
Far Infrared ◽  
Bioactive Constituents ◽  
Solvent Removal ◽  
Sample Extraction ◽  
Wide Range ◽  
Conventional Solvent Extraction ◽  
Capillary Electrophoretic

Background: Sample preparation is crucially important for the capillary electrophoretic measurement of the bioactive constituents in Citri Reticulatae Pericarpium because conventional solvent extraction is time-consuming and the solvent peaks seriously interfere with the measured capillary electropherograms. Objective: The objective of the present study is to establish far infrared-assisted sample preparation approaches for the analysis of Citri Reticulatae Pericarpium. Methods: Synephrine and hesperidin in Citri Reticulatae Pericarpium were determined by capillary electrophoresis in combination with far infrared-assisted sample extraction and solvent removal. Results: The effects of detection potentials, irradiation times and the voltages applied to the infrared generator were investigated to acquire the optimal assay conditions. Synephrine and hesperidin could be well separated within 6 min at a separation voltage of 9 kV in an alkaline borate solution. Satisfactory linearity was observed over the concentration range of 0.001 to 1 mM with the detection limits of 0.43 and 0.52 μM for synephrine and hesperidin, respectively. The results exhibited that far infrared irradiations could enhance the efficiencies of sample extraction and solvent removal during the sample preparation of Citri Reticulatae Pericarpium. The extraction time was significantly reduced to 6 min while the interference of the solvent peaks towards the electropherograms was eliminated. Conclusion: Far infrared-accelerated extraction and solvent removal were employed in the capillary electrophoretic determination of the bioactive constituents in Citri Reticulatae Pericarpium with satisfactory results. The ease, simplicity, efficiency and low cost of the novel sample preparation approaches indicate they may find a wide range of applications.

Determination of three phenolic acids in Cimicifugae rhizoma by capillary electrophoresis with a graphene–phenolic resin composite electrode

2019 ◽  
Vol 11 (3) ◽  
pp. 303-308 ◽  
Author(s):  
Hua Mao ◽  
Yan Zhang ◽  
Gang Chen
Keyword(s):  
Capillary Electrophoresis ◽  
Phenolic Acids ◽  
Phenolic Resin ◽  
Composite Electrode ◽  
Resin Composite ◽  
Amperometric Detection

A graphene–phenolic resin composite electrode was fabricated by in situ crosslinking for enhanced amperometric detection of capillary electrophoresis.

Sign in / Sign up

Export Citation Format

Share Document