As part of the study solubility lanthanide fluorides in salt melts, a EuF3-NaCl-KCl system (upper and bottom parts) was carried out. This is particular interest due to fact that Europium has two oxidation states (+2 +3), chloride ions are weak reducing agents. The studies were out by chemical nondestructive spectroscopic methods. for latter, solid-phase luminescence (SPL), diffusereflectance sp...

In this paper, a novel chemiluminescence (CL) method for the determination of tramadol has been developed by combining the flow injection technique and its sensitizing effect on the weak CL reaction between sulfite and acidic KMnO4. A mechanism for the CL reaction has been proposed on the basis of fluorescent and CL spectra. Under the optimized conditions, the proposed method allows the measure...

Herein we report that the reaction of KMnO4 with cobalt nanoparticles coated with multiple graphene layers forms a promising catalyst toward water oxidation. The compound was characterized by scanning electron microscopy, energy-dispersive spectroscopy, high resolution transmission electron microscopy, X-ray diffraction, electronic spectroscopy, Fourier transform infrared spectroscopy, and atom...

A simple, sensitive and reliable method for the separation, preconcentration and determination of ultra trace amounts of chromium species has been developed. Chromium(VI) in aqueous sample was reacted with 9-phenyl-2,3,7-trihydroxy-6-fluorone to produce a chelate at pH of 5.0 and extracted onto the magnetic nanoparticles coated with the ionic liquid 1-hexadecyl-3methylimidazolium bromide. The t...

Different chemical formulations for the synthesis of highly intercalated graphite bisulfate have been tested. In particular, nitric acid, potassium nitrate, potassium dichromate, potassium permanganate, sodium periodate, sodium chlorate, and hydrogen peroxide have been used in this synthesis scheme as the auxiliary reagent (oxidizing agent). In order to evaluate the presence of delamination, an...

The oxidation of chlorinated ethenes by potassium permanganate (KMnO4) is increasingly being used to remediate contaminated ground water. Typically the remediation of these sites is assessed by tracking changes in the concentrations of the chlorinated compounds and the chloride produced by the reaction. However, this method can be problematic in a fractured bedrock environment, due to the inher...