Download or read book Studies on the Development and Characterization of a Microwave Induced Plasma for Optical Emission Spectrometry microform written by Bollo-Kamara, Arthur and published by National Library of Canada. This book was released on 1982 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microwave Induced Plasma Analytical Spectrometry written by Krzysztof J. Jankowski and published by Royal Society of Chemistry. This book was released on 2011 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the most comprehensive publication on MWP technology and MWP-OES analytical spectrometry with an emphasis on practical issues.
Download or read book Fundamental Studies and Applications in Microwave induced Plasma Optical Emission Spectrometry written by Charles Bryson Williams (III) and published by . This book was released on 2019 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave-induced plasma optical emission spectrometry (MIP OES) is a technique within Atomic Spectrometry which is rapidly growing, following the relatively recent introduction of a complete commercial instrument based on the Hammer-cavity MIP. It offers advantages of low cost and simple operation, as well as the ability to run on air, enabling it to be used in remote areas or places with underdeveloped infrastructure. Due to the relative novelty of the technique, intensive method development for specific sample types is necessary to expand the utility of the technique and compensate for some of its limitations, such as its relatively low robustness and sequential detection. In addition, developments in plasma diagnostics and novel calibration strategies are also important to help increase the prominence and utility of the technique. The present research covers several such applications and efforts to improve instrumentation performance, as well as more fundamental studies of the properties of the plasma. In the first project, a method was developed to determine concentrations of Ca, K, and Na in various soft drinks. Addition and recovery experiments were used to evaluate the accuracy of the method. This study shows the ability of the technique to withstand relatively complex matrices, with no sample preparation other than simple dilution, and produce accurate results with traditional calibration methods. The second project involved development of a rapid dry-ashing technique to prepare samples for analysis using MIP. Calcium, Fe, K, Mg, Na and Zn were determined in complex-matrix samples such as tomato leaves, cheese, butter, peanut butter, infant formula and biodiesel samples. General agreement was also found between MIP OES results from samples decomposed either by the dry-ashing method or by a conventional microwave-assisted digestion procedure, and accurate results were found when applying the new, simpler method in certified reference material analyses. In the third project, several molecular species, naturally occurring in the plasma, were evaluated for their use as a plasma diagnostic tool. The N2+ / OH emission intensity ratio was evaluated for identifying the best instrumental operating conditions in MIP OES. Aluminum, Ba, Mn, Sr and Zn (analytes), and high concentrations of C, Na, Ca, HNO3 and HCl (sample matrices) were used as models to investigate the effects of complex matrices on analyte recoveries. The N2+ / OH signal ratio was more sensitive to changes in plasma conditions than the traditionally-used Mg II / Mg I ratio. Some other advantages include real-time monitoring capabilities, and the possibility of independently tracking variations in both plasma and sample introduction. Significant improvements in accuracy were achieved by employing the analyte-to-molecular species signal ratio, or their product, for calibration. In the final project, a novel calibration method, multi-flow calibration (MFC), was proposed. This strategy involves the use of multiple nebulization gas flow rates in the analysis to mitigate error caused by employing suboptimal sample introduction conditions, and to eliminate the need for optimization of conditions. The new calibration method was applied to the determination of Cr, Cu, Fe, and Mn in water and food samples. Addition recovery experiments and certified reference materials were used to validate the method. Multi-flow calibration presents comparable or superior accuracy to the traditional external standard calibration (EC), and offers simpler sample preparation than EC, requiring only a single standard and no modification of the sample introduction equipment.
Download or read book Development and Characterization of the Moderate Power Microwave Induced Plasmas written by Yong Nam Pak and published by . This book was released on 1988 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Emission Spectral Analysis with High frequency and Microwave Induced Plasma Sources written by José Alfons Clement Broekaert and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1994 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Characterization of Tandem Plasma Sources for Direct Solids Analysis Via Atomic Emission Spectrometry written by Fu-He Li and published by . This book was released on 1997 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of the Microwave Induced Plasma as a Detector for Supercritical Fluid Chromatography written by Leonard J. Galante and published by . This book was released on 1988 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: A microwave induced plasma (MIP) sustained in helium is evaluated as an element selective detector for capillary supercritical fluid chromatography (SFC). The plasma source, a surface microwave induced plasma (surfatron), is described. Optimal plasma conditions including viewing position, helium flow rate, and applied microwave power are discussed for sulfur emission in the near-infrared spectral region. In addition, the effects of two common mobile phases (CO2 and N2O) on plasma stability, sensitivity, and spectral background from 200 nm to 1100 nm are assessed. Although the plasma was evaluated principally for use with SFC, much of the discussion is relevant to its application as a gas chromatographic detector. Keywords: Supercritical fluid chromatography; Nonmetal detection; Spectroscopic detector; Speciation; Sulfur detection. (jd/rh).
Download or read book Construction and Analysis of a Microwave induced Plasma Lamp for Precision Spectroscopy written by Andreas Boesch and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopy is one of the most powerful techniques to analyze light of astronomical objects. New instrumentation strives to extend high-precision spectroscopy from the optical to the near-infrared spectral range. This development is driven by research on cool low-mass stars and the search for low-mass extrasolar planets with the radial velocity technique. A crucial requirement for precise spectroscopic measurements is the wavelength calibration that maps the pixels of a spectrograph's detector to the corresponding wavelengths. In the optical, hollow cathode lamps and gas absorption cells a ...
Download or read book Fundamental and Applied Studies of a Microwave induced Plasma Atomic Emission Source as a Detector for Gas Chromatography written by Christopher Lee Thomas and published by . This book was released on 1995 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of a Low Power Microwave Induced Plasma Source for Elemental Analysis by Atomic Emission Spectroscopy written by Lawrence Gerard Matus and published by . This book was released on 1983 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical and Laser Spectroscopic Study of Microwave Plasma assisted Combustion written by Wei Wu and published by . This book was released on 2016 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonthermal plasma-assisted combustion (PAC) has been demonstrated to be a promising potential method to enhance combustion performance and reduce the pollutant emissions. To better understand the mechanism in PAC, we have conducted a series of studies on the combustion enhancement by plasma using a home-developed PAC platform which employs a nonthermal microwave argon plasma and a suit of optical diagnostic tools including optical imaging, optical emission spectroscopy, and cavity ringdown spectroscopy. A new PAC system in which a continuous atmospheric argon microwave plasma jet is employed to enhance combustion of methane/air mixtures was reported. Reactive species in PAC were characterized in a state-resolved manner including the simultaneously measurements of OH(A) and OH(X) radicals in the PAC flames. Roles of the state-resolved OH(A) and OH(X) radicals in microwave PAC of premixed methane/air mixture were explored. It was concluded that if both OH(A) and OH(X) radicals assisted the ignition and flame stabilization processes, then we may hypothesize that the role of OH(A) was more dominant in the ignition enhancement but the role of OH(X) was more dominant in the flame stabilization. The effect of fuel injection configurations was investigated in the comparative study between PAC of the premixed and nonpremixed methane/air mixtures. It was found that emissions from the CH (A-X) and C2 Swan systems only exist in the nonpremixed PAC which suggest that the reaction pathways are different between premixed and nonpremixed PAC. The PAC of premixed methane/oxygen/argon mixtures was investigated. A Ushaped dual-layer curve of fuel ignition/flame stabilization limit showing the effects of the plasma power on the fuel ignition and flame stabilization was observed and reported. A parametric study of the microwave PAC of the premixed ethylene/air mixtures was conducted. Behavior of the OH, CH, and C2 radicals and their dependence on plasma power, argon flow rate, and total ethylene/air mixture flow rate were also studied.
Download or read book Application of Microwave induced Plasma Emission Spectroscopy MIPES to the Study of Gas solid Reactions written by Atilla Mehmet Oner and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Characterization of the Graphite Filament Plasma as an Excitation Source for Atomic Emission Spectroscopy written by Daniel John Churella and published by . This book was released on 1986 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Dual Microwave induced Plasma System with Direct Solution Introduction for Atomic Emission Spectrometry written by Shaoming Chen and published by . This book was released on 1990 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Inductively Coupled Plasma mass Spectrometry Using Mixed Gas Plasmas microform written by Joseph W. H. Lam and published by National Library of Canada. This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
