[PDF] Top 20 Highly Sensitive Determination of Theophylline Based on Graphene Quantum Dots Modified Electrode

... Graphene quantum dots (GQDs) are fragments of graphene with size of less than 30 ...carbon dots (CDs) and graphene ...the quantum confinement and edge effects which give ... See full document

... is highly essential to perform the biological functions ...the sensitive determination of DA is of great significance in the biological diagnoses ...the determination of DA over other ... See full document

... functionalized graphene sheet (PTCA-GS)/multi-wall carbon nanotubes (MWCNTs)/ionic liquid (IL) [19], poly (chromotrope 2B) [20], carbon nanotubes (CNT)-IL-graphene oxide (GO) [21], and thioglycolic acid ... See full document

... the modified electrode, the DPV for 50 µmol L -1 TP in PBS was recorded to periodically measure the response ...present modified electrode was extremely stable and highly ... See full document

... Reduced Graphene oxide, Polyaniline protected Reduced Graphene Oxide and Reduced Graphene oxide- Polyaniline / Nafion modified glassy carbon (RGO-PANI / Nf / GCE) electrode was prepared ... See full document

... area, quantum size effect, high adsorption ability, good biocompatibility, strong super paramagnetic property, low toxicity and easy preparation, resulting in a broader range of applications in catalysis, ... See full document

... and graphene modified electrodes were developed for MD ...proposed based on 3D N-doped graphene aerogels (NGAs) ...NGAs modified electrode exhibited prominent sensing ... See full document

... maltol determination, researchers has worked out diverse approaches like spectrophotometry [6-8], gas chromatographymass spectrometry (GC–MS) [9], liquid chromatography amperometric probing (LC–ED) [10], efficient ... See full document

... years, graphene, a one-atom thick layer consisting of carbon atoms arranged in a honeycomb lattice with sp 2 hybridization, has aroused increasing attention as sensing element in electrochemical detections due to ... See full document

... its sensitive determination is highly important in food and pharmaceutical samples ...chemically modified electrodes are reported for FA detection [1, ...Recently, graphene based ... See full document

... facile, sensitive and accurate method for simultaneous determination of dihydroxybenzene isomers analysis is crucial ...pH based-flow injection analysis ...materials modified on the surface of ... See full document

... in physiological media such as PBS, which is characterized by a high ionic strength, and form a transparent solution with a yellow color (Figure 2A). Under UV light irradiation, the color of the GQD dispersion changes to ... See full document

... the modified electrode surface, significant decrease in redox current were observed, which suggested that biomacromolecules had been successfully immobilized on the surface and the proteins inhibited the ... See full document

... Nevertheless, based on previous reports, extensive application of electrochemical immunosensors in clinical detection has been rarely presented [27-30], possibly due to the requirement of simple albeit ... See full document

... composite modified GC electrode and its application for the voltammetric determination of AC in neutral buffer solution has been ...the modified electrode. The polymer nanocomposite ... See full document

... biosensor based on GR paste electrode modified with prussian blue and chitosan (CS) ...reduced graphene oxide modified GCE (hep/CS-rGO/GCE) for detection of Pb 2+ ...nanocomposite ... See full document

... Unfortunately, some of these techniques could not cater to the maximum contaminant level (MCL) released by the Environmental Protection Agency (EPA; 1 ppm, 21.7 μM), whereas others require expensive and sophisticated ... See full document

... at graphene modified glassy carbon electrode in Britton-Robinson buffer (pH ...The electrode dynamic parameters were investigated and the oxidation mechanism was ...the modified sensor ... See full document

... The maximum peak current was observed at pH 2.0 and then the peak currents decreased as the pH further increased, indicating that H + might involve in the oxidation process of sulfonamide at the surface of the ... See full document

... quality graphene nanosheets in large scale by reduction of GO using ascorbic ...The modified electrode fabricated by graphene and chitosan can be applied for simultaneous determination ... See full document