96 research outputs found
Source identification and temporal evolution of trace elements in PM 10 collected near to Ny-Ã…lesund (Norwegian Arctic)
Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode
Stripping voltammetry for field determination of traces of copper in soil extracts and natural waters
Characterization and temporal evolution of the elemental composition of PM10 collected at Ny-Ålesund (The Arctic)
Characterization and Temporal Evolution of the Inorganic Component of PM10 Collected at Ny-Ålesund (Arctica)
Temporal trends in the atmospheric concentration of selected metals in the PM10 aerosol collected in March-September 2010 at Ny-Ålesund (Svalbard Islands)
Voltammetric Study for the Determination of Diclofenac in Aqueous Solutions Using Electro-Activated Carbon Electrodes
Diclofenac (DCF) is a nonsteroidal anti-inflammatory drug to treat pain and inflammatory diseases. The high consumption of the drug leads to a significant change in the ecosystem. With the aim of optimizing a fast screening analysis for DCF detection on many samples with a sensitive and cheap procedure, we considered electrochemical methods using carbon-based electrodes as sensors. The electrochemical behavior of the DCF was studied on glassy carbon electrodes (GCE) and on screen-printed carbon electrodes (SPCEs) from two different suppliers after an anodic activation. The surface of the SPCEs was analyzed by scanning electron microscope (SEM) and Energy Dispersive Spectrometry (EDS). On all the activated electrodes, the voltammetric procedure (Differential Pulse Voltammetry) for the determination of DCF was optimized by the Experimental Design method, and the linearity range of the response, as well as the calibration and limit parameters (limits of detection—LoD; limit of quantification—LoQ), were defined. Analyses on SPCEs were performed both by immersing the electrode in the solution and by deposing a drop of solution on the electrode. DCF signals are stabilized by the polishing process and enhanced by the anodic activation and acid pH. The electrochemical response of DCF is not reversible, and its by-products tend to be adsorbed on the surfaces, particularly on GCE. The lowest limit parameters were obtained using the GCE (LoD = 1.6 µg L−1) and the SPCE, having the smallest surface, immersed in solution (LoD = 7 µg L−1)
Characterization and transport processes of selected elements associated with atmospheric PM10 in the Arctic region (Ny-Alesund, Svalbard Islands)
Performances isocinétiques et risque lésionnel de l’épaule chez le joueur de handball de haut niveau
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