Results 251 to 260 of about 163,771 (279)

Arsenic speciation in natural waters by cathodic stripping voltammetry

Analytica Chimica Acta, 2010
Contamination of groundwater with arsenic (As) is a major health risk through contamination of drinking and irrigation water supplies. In geochemically reducing conditions As is mostly present as As(III), its most toxic species. Various methods exist to determine As in water but these are not suitable for monitoring arsenic speciation at its original ...
Kristoff, Gibbon-Walsh, Pascal, Salaün, Constant M G, van den Berg   +2 more
openaire   +2 more sources

Cathodic stripping voltammetry of the copper–1,10‐phenanthroline complex

Electroanalysis, 1995
AbstractCathodic stripping voltammetry of copper, based on the accumulation and reduction of its complex with 1,10‐phenanthroline (phen), has been studied. The complex is reduced in two steps from CuI–phen and CuII–phen to copper amalgam at potentials of −0.43 and −0.62 V vs. Ag/AgCl, respectively.
Čuljak, Ivan, Mlakar, Marina, Branica, Marko   +2 more
openaire   +1 more source

Determination of mebendazole in urine by cathodic stripping voltammetry

Analytica Chimica Acta, 1996
Abstract A cathodic stripping procedure has been developed for the determination of mebendazole. An 8 min accumulation time on a 0.1 M acetic acid/acetate pH = 5 buffer solution gives rise to a detection limit of 3 × 10−11M. An extraction with ether has been developed for the determination of mebendazole in urine. Concentrations of 5 × 10−9M in urine
A.J. Conesa, J.M. Pinilla, L. Hernández
openaire   +1 more source

Analysis of arsenic(V) by cathodic stripping voltammetry

Analytica Chimica Acta, 1995
Abstract A novel electrochemical stripping approach is presented for the trace measurement of arsenate. It is based on the reduction of As(V) in a mannitol and perchlorate containing solution, the coprecipitation with copper and the voltammetric determination by further reduction to AsH3 at the hanging mercury drop electrode.
U. Greulach, G. Henze
openaire   +1 more source

Determination of selenium by catalytic cathodic stripping voltammetry

Analytica Chimica Acta, 2000
A procedure is described for the determination of selenium in natural waters using cathodic stripping voltammetry in the presence of rhodium. Advantage is taken from a catalytic effect on the electrochemical reduction of protons in the presence of a mixed complex of selenide with rhodium and chloride, containing Cl‐Rh‐SeH species.
Britta Lange, Constant M.G. van den Berg
openaire   +1 more source

Cathodic stripping voltammetry of glutathione in natural waters

The Analyst, 1993
The electrochemistry of metal–glutathione complexes at a hanging mercury drop electrode was investigated and a procedure was optimized to determine glutathione in natural waters using cathodic stripping voltammetry (CSV). Adsorption of complexes of mercury(I) and copper(I) with glutathione can be utilized to preconcentrate the glutathione on the ...
Anne-Christine Le Gall, Constant M. G. van den Berg   +1 more
openaire   +1 more source

Cathodic stripping voltammetry of Cu2Se at mercury electrodes

Journal of Electroanalytical Chemistry, 1994
The electrochemistry of the codeposition of Se(IV) and Cu2+ at a hanging-mercury-drop electrode has been studied in detail in 0.1 M HClO4 or HCl solutions.
G. Mattsson, L. Nyholm, Å. Olin
openaire   +1 more source

Square-wave adsorptive cathodic stripping voltammetry of pantoprazole

Journal of Pharmaceutical and Biomedical Analysis, 2003
Adsorption and reduction of pantoprazole were investigated by cyclic and square-wave voltammetry on a hanging mercury drop electrode in Britton-Robinson buffers at pH 2.0-11.0. The reduction process gave rise to a single peak within the entire pH range.
openaire   +2 more sources

Determination of dimethoate in water by cathodic stripping square-wave voltammetry

Electroanalysis, 1994
Artículos en revistasThis article describes the direct-determination of the pesticide dimethoate In river water in an alkalin media and accumulaton medium through cathodic stripping voltammetry. By employing an alkaline potential of 30 mV, reduction peak
Galán Estella, Fernando, Hernández Hernández, Pedro, Ballesteros Iglesias, María Yolanda, Hernández Hernández, Lucas   +3 more
exaly   +1 more source

Cathodic stripping voltammetry of catechol and some catecholamines

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1986
Abstract The cathodic stripping voltammetry of catechol, L-dopa, dopamine and norepinephrine at a hanging mercury electrode is described. These compounds can be determined at concentrations of 2 × 10−8 to 5 × 10−7M. Interference by surface-active agents and other organic compounds was studied.
openaire   +1 more source