Two simple, precise, and sensitive voltammetric methods for the determination of Danofloxacin (DFX) were developed. These methods were used to explore the adsorption behavior of the investigated antibacterial through oxidation reduction at hanging mercury dropping electrode (HMDE) by direct method I and secondly by modified method II via its complexation with PdCl2. The drug was accumulated on ...

Voltammetric detection of the toxic Zn ion was investigated using a fluorine-doped graphite pencil electrode (FPE). It is notable from the study that pencils were used as reference and working electrodes. In all the experiments, a clean seawater electrolyte solution was used to yield good results. The analytical working range was attained to 10 μgL(-1). The optimized voltammetric condition was ...

A thin film of epinephrine (EP) was electrochemically deposited on the surface of glassy carbon electrode previously activated in NaHCO3 solution. The cyclic voltammograms of the modified electrode indicate that the surface confined EP are strongly dependent on the solution pH, as expected for quinone/hydroquinone functionalities. The EP-modified glassy carbon electrode exhibited...

In this work we report on a new, rapid and simple voltammetric method to determine the total antioxidant capacity (TAC) of the edible oils. The method explores the ABTS radical (2,2'-azinobis(3-ethylbenzothiazoline-6-sulphonic acid)) assay as a redox probe and it relays on measuring catalytic voltammetric currents. The electrocatalysis comprises redox regeneration of the electrochemically creat...

The aim of the work was to compare two analytical methods of trace analysis in respect to their applicability in heavy metals determination in biological samples. Atomic absorption spectrometry (AAS) may be considered as the method of choice in such analyses due to its accuracy, precision and low detection limit. On the other hand, voltammetric methods seem to be as useful, but rarely applied. ...

Electrostatic interactions with metal ions are essential to the structural stability and polymorphism of oligonucleotides. This thesis describes the extended applications of a simple electrochemical protocol, based on the voltammetric response of multiplycharged transition metal cations ( [ R u ( N H ~ ) ~ ] ~ + ) bound electrostatically to DNAmodified surfaces, to explore the kinetics of metal...

This work reports the use of modified screen-printed carbon electrodes (SPCEs) for identification three drugs abuse and two habitual cutting agents, caffeine paracetamol, combining voltammetric sensing chemometrics. In order to achieve this goal, codeine, heroin morphine were subjected Square Wave Voltammetry (SWV) at pH 7, in elucidate their electrochemical fingerprints. The optimized SPCEs el...

Trace metals play an important role in the regulation of primary productivity and phytoplankton community composition. Metal species directly affects biogeochemical cycling processes, transport, fate, bioavailability toxicity trace metals. Therefore, developing powerful methods for metal speciation analysis is very useful research a range fields, including chemical environmental analysis. Volta...

In recent years, new strategies for bacteria determination have been developed in order to achieve rapid detection and adequate limits of quantification microorganisms. This review classifies voltammetric sensors according whether the are directly or indirectly detected. Direct methods based on recognition themselves, either labeled label-free mode. contrast, indirect detect a metabolite produc...

The surface functionalities of commercial sulfonate-modified carbon nanoparticles (ca. 9-18 nm diameter, Emperor 2000) have been converted from negatively charged to positively charged via sulfonylchloride formation followed by reaction with amines to give suphonamides. With ethylenediamine, the resulting positively charged carbon nanoparticles exhibit water solubility (in the absence of added ...