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Networks of different carbon nanotube (CNT) materials were investigated as resistive gas sensors for NO 2 detection. Sensor films were fabricated by airbrushing dispersions of double-walled and multi-walled CNTs (DWNTs and MWNTs, respectively) on alumina substrates. Sensors were characterized by resistance measurements from 25 to 250°C in air atmosphere in order to find the optimum detection...
Two advanced oxidation processes (AOPs), based on high-intensity focused ultrasound (HIFU), namely, KMnO 4 /HCl/HIFU and H 2 O 2 /HCl/HIFU are studied and compared for the determination of toxic arsenic in human urine [As(III)+As(V)+MMA+DMA] by flow-injection hydride-generation atomic absorption spectrometry (FI-HG-AAS). The KMnO 4 /HCl/HIFU procedure was found to be...
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