Showing papers by "Jens Enevold Thaulov Andersen published in 1998"
TL;DR: In this article, hydrogen peroxide was used as an oxidant in Flow Injection Analysis (FIA) and the formation of gaseous components during the analysis was suppressed by maintaining the concentration of H peroxide lower than 0.15% in 0.1 M NaOH.
56 citations
TL;DR: In this paper, the influence of the Cu adatoms and ions on the initial stages of copper electrodeposition on polycrystalline Pt in acidified copper sulphate solution have been studied by cyclic voltammetry, potentiostatic current transients, rotating ring-disk electrode ( rrde ), and in situ scanning tunnelling microscopy (STM).
30 citations
TL;DR: In situ scanning tunneling (STM) and atomic force microscopy (AFM) have opened new perspectives for addressing adsorbed metalloproteins in their natural functional aqueous medium at the molecular level as mentioned in this paper.
20 citations
TL;DR: In this paper, a semi-mercury free potentiometric stripping analysis (S-MF PSA) was performed on brass samples with a thin-film mercury covered glassy carbon working electrode and dissolved oxygen as oxidizing agent during the stripping step.
Abstract: Assays of copper and zinc in brass samples were performed by semi-mercury free potentiometric stripping analysis (S-MF PSA) using a thin-film mercury covered glassy-carbon working electrode and dissolved oxygen as oxidizing agent during the stripping step. The stripping peak transients were resolved by chemometrics, which enabled simultaneous determination of both the copper and the zinc concentrations, thereby eliminating the conventional necessary pretreatment of the sample solution, such as initial addition of Ga(III) or solvent extraction of copper. The brass samples were diluted by factors in the range 2 · 104– 5 · 105 which resulted in quantification of the copper and of zinc contents comparable to the specified values within 10%. On the basis of the chemometric treatment, an empirical expression is deduced relating the stripping time to the recorded potential.
6 citations
TL;DR: In this paper, a chemically and mechanically robust two-component system was proposed for AFM with no need for instrumental modification, but can easily be adapted to other commercial instruments, and it is a closed system with insignificant sample evaporation.
Abstract: AFM instrument with no need for instrumental modification, but can easily be adapted to other commercial instruments. The cell is a closed system with insignificant sample evaporation. It is a chemically and mechanically robust two-component system which enables fast assembly and testing prior to insertion and minimizes leakage problems. The cell is also laterally flexible, facilitating scanning of large areas, holds inlets for rapid flushing and change of solution, and contains an optical device for adjusting the laser beam deflection in aqueous and gas ambient environments.
1 citations