Download or read book Foster Hal written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The folder may include clippings, announcements, small exhibition catalogs, and other ephemeral items.
Download or read book INVESTIGATION OF INDUCTIVELY COUPLED PLASMA AS AN ATOMIZATION SOURCE FOR ANALYTICAL AND FUNDAMENTAL MEASUREMENTS USING CAVITY RINGDOWN SPECTROSCOPY written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical as well as fundamental measurements were performed with an inductively coupled plasma (ICP) using the novel technique of cavity ringdown spectroscopy. A newly designed ICP torch was presented. Limits of detection were measured for elemental mercury, both in an ICP as well as in a cold mercury chemical generator. The efficiency of the technique was compared with laser-induced fluorescence (LIF) in the ICP. Isotopically resolved spectra of uranium were collected with this technique and results were compared to previous studies using LIF. Gas temperature and electron density estimations were done by lineshape measurements on lead atoms in the ICP. Abel inversion technique was used to extract absolute atom densities and ringdown proved to be an excellent candidate for trace detection when coupled with an atomization source. Spectra of hydroxyl radical coming from dissociation of water molecules in air were recorded and OH density was estimated. The plasma was found to be in local thermal equilibrium by comparing simulated and measured OH emission spectra. Future developments of cavity ringdown with ICP using continuous-wave lasers are discussed.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamental Studies of the Analytical Applications of an Inductively Coupled Plasma Source written by M. R. Cave and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies of an Inductively Coupled Plasma with a Fourier transform Spectrometer Plasma Excitation Source for Analytical Atomic Spectroscopy written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The inductively coupled plasma (ICP) excitation source for analytical atomic spectroscopy has been studied with the one-meter Fourier-transform spectrometer (FTS) located at Kitt Peak National Observatory, Tucson, Arizona. The high resolution of this spectrometer combined with the comprehensive wavelength coverage of the Fourier transform technique, allows the use of the spectra for elucidation of spectraphysical properties such as excitation temperatures and line widths. From these studies, the analytical applicability of the ICP-FTS combination is evaluated for atomic spectrochemical measurements in the visible and ultraviolet. 4 figures, 1 table.
Download or read book Inductively Coupled Plasma written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle size effects and elemental fractionation in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) are investigated with nanosecond and femtosecond laser ablation, differential mobility analysis, and magnetic sector ICP-MS. Laser pulse width was found to have a significant influence on the LA particle size distribution and the elemental composition of the aerosol and thus fractionation. Emission from individual particles from solution nebulization, glass, and a pressed powder pellet are observed with high speed digital photography. The presence of intact particles in an ICP is shown to be a likely source of fractionation. A technique for the online detection of stimulated elemental release from neural tissue using magnetic sector ICP-MS is described. Detection limits of 1 [mu]g L−1 or better were found for P, Mn, Fe, Cu, and Zn in a 60 [mu]L injection in a physiological saline matrix.
Download or read book Fundamental Studies of the Plasma Extraction and Ion Beam Formation Processes in Inductively Coupled Plasma Mass Spectrometry written by and published by . This book was released on 1995 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental and practical aspects are described for extracting ions from atmospheric pressure plasma sources into an analytical mass spectrometer. Methodologies and basic concepts of inductively coupled plasma mass spectrometry (ICP-MS) are emphasized in the discussion, including ion source, sampling interface, supersonic expansion, slumming process, ion optics and beam focusing, and vacuum considerations. Some new developments and innovative designs are introduced. The plasma extraction process in ICP-MS was investigated by Langmuir measurements in the region between the skimmer and first ion lens. Electron temperature (T{sub e}) is in the range 2000--11000 K and changes with probe position inside an aerosol gas flow. Electron density (n{sub e}) is in the range 108--101° {sup -cm }at the skimmer tip and drops abruptly to 106--108 cm−3 near the skimmer tip and drops abruptly to 106--108 cm−3 downstream further behind the skimmer. Electron density in the beam leaving the skimmer also depends on water loading and on the presence and mass of matrix elements. Axially resolved distributions of electron number-density and electron temperature were obtained to characterize the ion beam at a variety of plasma operating conditions. The electron density dropped by a factor of 101 along the centerline between the sampler and skimmer cones in the first stage and continued to drop by factors of 104--105 downstream of skimmer to the entrance of ion lens. The electron density in the beam expansion behind sampler cone exhibited a 1/z2 intensity fall-off (z is the axial position). An second beam expansion originated from the skimmer entrance, and the beam flow underwent with another 1/z2 fall-off behind the skimmer. Skimmer interactions play an important role in plasma extraction in the ICP-MS instrument.
Download or read book Development and Characterization of a Miniature Inductively Coupled Plasma Source for Atomic Emission Spectrometry written by R. N. Savage and published by . This book was released on 1978 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A miniature inductively coupled plasma source for atomic emission spectrometry is described and a preliminary evaluation of its analytical capabilities is presented. The mini-ICP is very economical to sustain and works well with less than 1 kW of RF power and 8L/min of argon coolant gas. In addition, the new source possesses some unique operating characteristics which simplify sample introduction. In this paper, detection limits, multi-element capabilities, and other analytical features of the mini-ICP are compared with those demonstrated by a conventional ICP source and shown to be comparable. In addition, the two plasmas are shown to exhibit similar excitation temperatures in the respective analyte observation regions (i.e., plasma tail flames). These results suggest that the mini-ICP possesses the same desirable atomization and excitation characteristics as conventional ICP sources. (Author).
Download or read book Inductively Coupled and Microwave Induced Plasma Sources for Mass Spectrometry written by E. Hywel Evans and published by . This book was released on 1995 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents practical application of the theory in a "tutorial" style, for the most important research in the field.
Download or read book Studies of the Inductively Coupled Plasma as a Source for Atomic Emission Spectrometry written by Aaron D. Weiss and published by . This book was released on 1980 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inductively Coupled Plasmas in Analytical Atomic Spectrometry written by Akbar Montaser and published by Wiley-VCH. This book was released on 1987 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Inductively Coupled Plasma Spectrometry written by Michael Thompson (Ph. D.) and published by Blackie Academic and Professional. This book was released on 1989 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Handbook of Inductively Coupled Plasma Spectrometry written by Michael Thompson and published by Chapman & Hall. This book was released on 1983 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inductively Coupled Plasma Spectrometry and Its Applications written by Steve J. Hill and published by Burns & Oates. This book was released on 1999-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume considers the principles of inductively coupled plasmas, the instrumentation, the methodology and applications within the three principal areas of environmental analysis, earth science and food science. There are two chapters on ICP–MS. No prior knowledge is assumed. To assist the ′hands–on′ user, details of the advantages and disadvantages of the various approaches are included.
Download or read book Study of Fundamental Plasma Properties in an Inductively Coupled Plasma Device written by Jia Han and published by . This book was released on 2020 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio frequency inductively coupled plasma sources are widely used in low temperature industrial processing. Recent computer simulations and experiments indicate significant improvement in processing results with the use of pulsed plasmas. This thesis reports simultaneous measurements of nearly all plasma and electromagnetic properties of an ICP in three-dimensions under pulsed operation.The plasma density profile is measured by rf compensated Langmuir probes, hairpin probes, and a 60 GHz microwave interferometer. Line integrated electron density measured from these three very distinct diagnostic techniques (interferometer, Langmuir probe, Hairpin resonator probe) shows agreement. Three-axis Bdot probes are used to measure the magnetic field. Inductive plasma current is calculated from measured magnetic field using Ampere's law. With the observed cylindrical symmetry, the electromagnetic electric field is derived from Bdot data using Faraday's law. The above field and current are used to calculate the inductive power and Poynting vector. A side by side comparison in pulsed plasma operation is presented for two industry-relevant neutral pressures (5 mTorr, 25 mTorr). Distinct plasma evolution is observed with the two cases. The observations from the experiment are explained with the help of a simple lumped element circuit model.
Download or read book Book of Abstracts written by and published by . This book was released on 1991 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of Inductively Coupled Plasma mass Spectrometry to Radionuclide Determinations written by Roy W. Morrow and published by ASTM International. This book was released on 1995 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers from the October 1994 title symposium, held in Gatlinburg, Tennessee, detail techniques in inductively coupled plasma-mass spectrometry (ICP-MS) for the purpose of radionuclide determination, in sections on application areas including nuclear production; high-level waste characterization; env
