A simultaneous determination with UV detection/capillary electrophoresis for Fe(II) and Fe(III) was achieved using a sulfonated bathophenantholine and desfferioxamine B. When the electrophoretic buffer was 60 mmol l(-1) SDS, 10 mmol l(-1) acetic acid (pH 4.0) and 10 mmol l(-1) ascorbic acid and at -10 kV, the iron(II) and iron(III) could not only be completely separated, but also be sensitively...

2-Hydroxy-pyridine when treated with concentrated sulfuric acid is sulfonated at the 3-position to yield the title hydrated salt, H(3)O(+)·C(5)H(4)NO(3)S(-)·2H(2)O. In the crystal structure, the cations, anions and uncoordinated water mol-ecules are linked by extensive O-H⋯O and N-H⋯O hydrogen bonds into a three-dimensional network. The crystal studied is a non-merohedral twin with a twin compo...

Excessive water production impacts the economics of petroleum reservoir and often leads to their premature shut-in. Production high saline represents a major corrosion for casing, tubing, flow lines, facilities. Polymer solution has been used control plug in high-temperature reservoirs. Most these polymer solutions consist polyacrylamide-based an organic or inorganic cross linker. Polyethylene m...

Characterization of the molar mass distribution (MMD) poly (ether ether ketone) (PEEK) is very troublesome due to insolubility PEEK in common solvents. The solubility may be substantially improved after its sulfonation. Sulfonated (SPEEK) was prepared by sulfonation with 98% concentrated H2SO4 at room temperature. presence sulfonic acid group (-SO3H) matrix confirmed nuclear magnetic resonance ...

Abstract Water pollution and the unsustainable use of fossil fuel derivatives require advanced catalytic methods to clean waters produce fine chemicals from modern biomass. Classical homogeneous catalysts such as sulfuric, phosphoric, hydrochloric acid are highly corrosive non-recyclable, whereas heterogeneous appear promising for lignocellulosic waste depolymerization, pollutant degradation, m...

We performed a free radical polymerization of acrylamide in an aqueous solution by radio frequency-driven atmospheric pressure plasma jet. The was catalyzed simultaneous generation nanoparticles resulting percentage polymer yield increased factor 2–30 times. Polyacrylamide acted as capping agent for the silver nanoparticle formation yielding smaller while uncontrolled growth and massive particl...