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Square-wave adsorptive cathodic stripping voltammetry of pantoprazole
Journal of Pharmaceutical and Biomedical Analysis, 2003Adsorption 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.
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Determination of salmon calcitonin by square wave adsorptive stripping voltammetry
Analytica Chimica Acta, 1997Abstract Salmon calcitonin (SC) was characterized voltammetrically at a mercury electrode by means of cyclic and square wave voltammetry. The voltammetric behavior of SC resembles the voltammetry of other biologically active compounds containing disulfide group(s). The existence of a well shaped peak due to reduction of adsorption SC was exploited to
J.G. Osteryoung, K.J. Wikiel
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Analysis of PTH‐Cysteine by Adsorptive Stripping Square‐Wave Voltammetry
Electroanalysis, 2009AbstractThe aim of this work is the study of cysteine by its derivative form. Cysteine derivation is done by Edman degradation and we obtain the phenylthiohydantoin of cysteine. Edman degradation is one of the most usual procedures for sequentate proteins.
C. Vilaseca +4 more
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Square wave adsorptive stripping voltammetry on mercury film electrodes
Analytica Chimica Acta, 1993Abstract In this paper the relative advantages of using square wave adsorptive stripping voltammetry in combination with a mercury film electrode as the working electrode were assessed. It was found that the resulting technique is fast, sensitive, offers excellent discrimination against the background current and can be used without deoxygenation of ...
Anastasios Economou, Peter R. Fielden
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Talanta, 2000
A reliable and very sensitive procedure for the determination of trace levels of molybdenum in seawater is proposed. The complex of molybdenum with 8-hydroxyquinoline (Oxine) is analyzed by cathodic stripping square-wave voltammetry based on the adsorption collection onto a hanging mercury drop electrode (HMDE).
Y C, Sun, J, Mierzwa, C R, Lan
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A reliable and very sensitive procedure for the determination of trace levels of molybdenum in seawater is proposed. The complex of molybdenum with 8-hydroxyquinoline (Oxine) is analyzed by cathodic stripping square-wave voltammetry based on the adsorption collection onto a hanging mercury drop electrode (HMDE).
Y C, Sun, J, Mierzwa, C R, Lan
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Adsorptive square wave stripping voltammetry for determination of azobenzene at trace levels
Analytical Chemistry, 1994This paper describes the determination of azobenzene in trace amounts by adsorptive square wave stripping voltammetry (SWV). The optimal SWV parameters found are step height ΔE s =5 mV, amplitude E SW =25 mV, and frequency f=200 Hz. A detection limit of 3×10 -12 M (0.5 pg mL -1 ) azobenzene was obtained after a 20-s preconcentration period at 0 V (vs ...
Gang. Xu +3 more
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Adsorption stripping square-wave voltammetry of copper ions in the presence of thiourea
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1986Abstract Cathodic stripping voltammetry at the static drop mercury electrode was adapted for the determination of trace amounts of copper in water. The determination is carried out after accumulation of the copper at the mercury surface as the thiourea complex. The nature of the complex and the dependence of the stripping peak current on accumulation
Ch. Yarnitzky, R. Schreiber-Stanger
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Adsorptive Stripping Square wave Voltammetry of Pharmaceutical Quinonic Derivatives
1990It is well known that the Polarographic reduction of quinone containing compounds gives rise to a well defined reversible two-electron wave.1–4 However, this faradic reaction is frequently accompanied by an adsorption process, more or less pronounced depending on the morphology of the investigated molecule.3 As illustrated by numerous examples,5 these ...
J.-C. Vire +4 more
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Peak current—frequency relationship in adsorptive stripping square-wave voltammetry
Journal of Electroanalytical Chemistry, 1992Abstract A reversible redox reaction between the adsorbed reactant and the dissolved product or the amalgam is analysed. The relationship between the square-wave (SW) stripping peak current and the SW frequency is a curve defined by Δφ max = 0, for f sw = 0, and an asymptote Δφ max = kf SW + z .
S̆ebojka Komorsky-Lovrić +2 more
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Study of the adsorptive stripping square‐wave voltammetry of bovine serum albumin
Electroanalysis, 1991AbstractThe adsorptive stripping square‐wave voltammetric behavior of bovine serum albumin (BSA) is described. Conditions were optimized for the determination of this protein with respect to accumulation potential, accumulation time, drop size, scan rate, frequency value, and electrolyte concentration.
J. Rodríguez Flores +4 more
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