fabrication and electrochemical characterization of a sensor for the determination of epinephrine (ep), uric acid (ua) and folic acid (fa) is described. the sensor  was prepared using carbon paste electrode (cpe) modified with 3,4-dihydroxybenzaldehyde-2,4-dinitrophenylhydrazone (ddp) and carbon nanotubes (cnts), which makes the modified electrode highly sensitive for the electrochemical detect...

This research synthesised zinc oxide (ZnO) structure by a hydrothermal method. ZnO samples were prepared using different molarities of (Zn) precursor, ranging from 0.10 to 0.16 M. Structural and morphological properties characterised X-ray diffraction (XRD) scanning electron microscopy (SEM). The XRD patterns show that all are prominently grown along the three peaks at (001), (002) (101) planes...

Phosphate (PO 4 3? ) is an important nutrient for phytoplankton growth and at high loadings can result in water quality deteriorations. Autonomous PO measurements are required monitoring purposes, best achieved using sensitive, portable low-cost techniques. Here we describe a new electrochemical sensor detection seawater. The quantification of typically depends on the reaction between molybdate...

the supercapacitive behavior of polyaniline/mno2-carbon black (pani/mno2-cb), mno2-cb nanocompositesand cb was studied. mno2-cb made by the in situ direct coating method to deposit mno2 onto cb; then pani coating was coated on it. morphology of the nanocomposite was studied by x-ray diffraction (xrd), fourier transform infrared (ft-ir) spectroscopy and scanning electron microscopy (sem). the el...

hybrid nanocomposites of binary pt-ru/polyaniline were prepared by oxidative polymerization of aniline andformation pt and ru nanoparticles. the polymerization of aniline was carried out in the presence of potassiumhexa cyano platinate (iv) and ruthenium (iii) nitrosyl nitrate as oxidizing agents. during the reaction anilinemonomers undergo oxidation and form polyaniline (pani) whereas the redu...

a reliable quantitative structure retention relationship (qsrr) study has been evaluated to predict the retention indices (ris) of a broad spectrum of compounds, namely 118 non-linear, cyclic and heterocyclic terpenoids (both saturated and unsaturated), on an hp-5ms fused silica column. a principal component analysis showed that seven compounds lay outside of the main cluster. after elimination...

Abstract In order to improve the catalytic performance, oxidation resistance and thermal stability of neutral alkyl ferrocene‐based combustion rate catalysts, mononuclear ferrocene energetic compounds were designed prepared, but four binuclear unexpectedly discovered during synthesis compounds. The new characterized by single‐crystal X‐ray diffraction, 1 H 13 C nuclear magnetic resonance spectr...

Cyclic Voltammetry (CV) is an electro-chemical characterization technique used in initial material screening for desired properties and to extract information about reactions. In some applications, kinetic of the associated reactions (e.g., rate constants turn over frequencies), CV curve should have a specific shape (for example S-shape). However, often settings obtain such are not known priori...

Electrochemical experiments like chronoamperometry or cyclic voltammetry (CV) are essential in the research for novel bioelectrochemical systems. These experiments, executed by a potentiostat, time-consuming which hinders progression. To speed up those this work presents potentiostat with 128 individual parallel stimulation and sensing channels. A channel architecture exploiting time division m...

The nitrofurazone (NF) electrochemical reduction has been studied by cyclic voltammetry (CV) and square wave (SWV) in non-aqueous medium using three different ionic liquids (IL): BMImTf2N, BMImBF4 BMMImTf2N, having a carbon fiber microelectrode as working electrode. In all of them, two reversible cathodic peaks were recorded for NF. Under higher frequency values, only one peak was registered. s...