1,721,003 research outputs found
Electrochemical preconcentration combined with atomic absorption spectrometry for the determination of heavy metals in water samples. Science of the Total Environment (1984), 37(1), 35-40. CODEN: STENDL ISSN: 0048-9697
No full textElectrostatic capture of gaseous tetraalkyllead compounds and their determination by electrothermal atomic-absorption spectrometry
No full textThe sampling of tetraalkyllead compds. in artificially polluted air by electrostatic capture and their subsequent detn. by electrothermal at.-absorption spectrometry are described. The technique, coupled to a low-cost, portable, battery-powered field sampler provides a fast, simple, and sensitive method for tetraalkyllead detn. in environmental samples. Detection limits are on the order of 100 pg of Pb
Spray deposition versus single-drop deposition for calibration of an electrostatic accumulation furnace for electrothermal atomization atomic absorption spectrometry
No full textSpray deposition, e.g., deposition by electrostatic capture of aerosol droplets (aerodynamic diam. of 1-2 m) generated from a std. soln. of the analyte is proposed for the calibration of the electrostatic accumulation furnace for electrothermal atomization at. absorption spectrometric anal. Deposition of the analyte can be achieved with a relative std. deviation of .apprx.2%. The spray deposition mode was insensitive to the aging and surface conditions of the furnace but not to the nature of the furnace material. The different behaviors obsd. for different materials are explained in terms of different atom loss mechanisms
Particle collection mechanism and efficiency in electrostatic accumulation furnace for electrothermal atomic spectrometry
No full textA deeper insight into the collection mechanism of an electrostatic accumulation furnace for electrothermal at. absorption spectrometric anal. was obtained. The electrostatic filter operates in the Trichel pulses region, and most of the captured species are accumulated in a region 3-4 mm wide centered around the tip of the active electrode. The capture efficiency, evaluated by direct particles counting, can be raised to >99% and is mainly related to the quantity of charge acquired by a particle within the active vol. of the electrostatic precipitator
Determination of mercury in sea water by combined electrolysis and electrothermal atomic absorption spectrometry
No full textDetermination of mercury vapor in air using electrothermal atomic-absorption spectrometry with an electrostatic accumulation furnace
No full text3-Way Principal Component Analysis delle concentrazioni di specie inorganiche in campioni di acqua e sedimento prelevati nel fiume Tronto
No full textCalibration problems in the determination of arsenic in the atmosphere by the "electrostatic accumulation furnace for electrothermal atomic spectrometry"
No full textThe possibility of capturing and detg. As species in different phys. states by the title method was demonstrated with the use of dust, As2O3, and AsH3. Calibration with aq. solns. works well with As2O3 and dust but not with AsH3. However, AsH3 (and other highly volatile compds.) represent a significant fraction of the total As only near specific sources of pollution
On the electrodeposition of mercury onto glassy carbon electrodes from very dilute mercury(II) solutions
No full textDetermination of lead in seawater by electrothermal atomic absorption spectrometry after electrolytic accumulation on a glassy carbon furnace
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