Download or read book Application of Laser Ablation Inductively Coupled Plasma Mass Spectrometry to Selected Tephra Layers in the Western United States written by Jeffrey C. Hathaway and published by . This book was released on 2011 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neogene Quaternary Continental Margin Volcanism written by Claus Siebe and published by Geological Society of America. This book was released on 2006-01-01 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Developments in Laser Ablation inductively Coupled Plasma mass Spectrometry for Use in Geology Forensics and Nuclear Nonproliferation Research written by and published by . This book was released on 2008 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation focused on new applications of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The diverse fields that were investigated show the versatility of the technique. In Chapter 2, LA-ICP-MS was used to investigate the rare earth element (REE) profiles of garnets from the Broken Hill Deposit in New South Wales, Australia. The normalized REE profiles helped to shed new light on the formation of deposits of sulfide ores. This information may be helpful in identifying the location of sulfide ore deposits in other locations. New sources of metals such as Pg, Zn, and Ag, produced from these ores, are needed to sustain our current technological society. The application of LA-ICP-MS presented in Chapter 3 is the forensics analysis of automotive putty and caulking. The elemental analysis of these materials was combined with the use of Principal Components Analysis (PCA). The PCA comparison was able to differentiate the automotive putty samples by manufacturer and lot number. The analysis of caulk was able to show a differentiation based on manufacturer, but no clear differentiation was shown by lot number. This differentiation may allow matching of evidence in the future. This will require many more analyses and the construction of a database made up of many different samples. The 4th chapter was a study of the capabilities of LA-ICP-MS for fast and precise analysis of particle ensembles for nuclear nonproliferation applications. Laser ablation has the ability to spatially resolve particle ensembles which may contain uranium or other actinides from other particles present in a sample. This is of importance in samples obtained from air on filter media. The particle ensembles of interest may be mixed in amongst dust and other particulates. A problem arises when ablating these particle ensembles directly from the filter media. Dust particles other than ones of interest may be accidentally entrained in the aerosol of the ablated particle ensemble. This would cause the analysis to be skewed. The use of a gelatin substrate allows the ablation a particle ensemble without disturbing other particles or the gelatin surface. A method to trap and ablate particles on filter paper using collodion was also investigated. The laser was used to dig through the collodion layer and into the particle ensemble. Both of these methods fix particles to allow spatial resolution of the particle ensembles. The use of vanillic acid as a possible enhancement to ablation was also studied. A vanillic acid coating of the particles fixed on top of the gelatin substrate was not found to have any positive effect on either signal intensity or precision. The mixing of vanillic acid in the collodion solution used to coat the filter paper increased ablation signal intensity by a factor of 4 to 5. There was little effect on precision, though. The collodion on filter paper method and the gelatin method of resolving particles have shown themselves to be possible tools in fighting proliferation of nuclear weapons and material. Future applications of LA-ICP-MS are only limited by the imagination of the investigator. Any material that can be ablated and aerosolized is a potential material for analysis by LA-ICP-MS. Improvements in aerosol transport, ablation chamber design, and laser focusing can make possible the ablation and analysis of very small amounts of material. This may perhaps lead to more possible uses in forensics. A similar method to the one used in Chapter 3 could perhaps be used to match drug residue to the place of origin. Perhaps a link could be made based on the elements leached from the soil by plants used to make drugs. This may have a specific pattern based on where the plant was grown. Synthetic drugs are produced in clandestine laboratories that are often times very dirty. The dust, debris, and unique materials in the lab environment could create enough variance to perhaps match drugs produced there to samples obtained...
Download or read book The Use of Laser Ablation Inductively Coupled Plasma Mass Spectrometry LA ICP MS for the Discrimination of Glass Fragments in Forensic Casework written by David William Szymanski and published by . This book was released on 2004 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Initial Report on the Application of Laser Ablation written by Marilynne R. Smith and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Tephrochronology written by W.E.N. Austin and published by Geological Society of London. This book was released on 2014-10-03 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Publication includes articles presenting recent advances in marine tephrochronological studies and outlines innovative techniques in geochemical fingerprinting, stratigraphy and the understanding of depositional processes. It represents a significant resource for the palaeoceanographic community at a time when marine tephrochronology is being more widely recognized. It will also serve as a valuable reference to a much wider community of Earth scientists, climate scientists and archaeologists, particularly in highlighting the role of tephra studies in stratigraphy and regional/extra-regional correlations, as well as in tracing the long-term history of regional and global volcanism in the deep-sea archive.
Download or read book Applications of Laser Ablation Inductively Coupled Plasma Mass Spectrometry for the Analysis of Solids written by Melody Bi and published by . This book was released on 2000 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Inductively Coupled Plasma mass Spectrometry to Radionuclide Determinations written by Roy W. Morrow and published by . This book was released on 1998 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of Laser Ablation Inductively Coupled Plasma Mass Spectrometry to the Determination of Environmental Contaminants in Calcified Biological Structures written by R. D. Evans and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resonant Laser Ablation written by and published by . This book was released on 1995 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since the first report of laser action, it has been recognized that laser ablation (evaporation/volatilization) may provide a useful sampling mechanism for chemical analysis. In particular, laser ablation is rapidly gaining popularity as a method of sample introduction for mass spectrometry. Since its original description, numerous research papers and review articles have appeared on various aspects of laser mass spectrometry. While most laser ablation/mass spectrometry has been performed with fixed frequency lasers operating at relatively high intensities/fluences (≥ 108 W/cm2, ≥ 1 J/cm2), there has been some recent interest in the use of low-power tunable lasers to ablate and resonantly ionize selected components in the ablation plume. This process has been termed resonant laser ablation (RLA). The authors report here on aspects of RLA behavior for a number of metals, alloys and thin films. The versatility of RLA is demonstrated, with results on a variety of samples and in several mass spectrometers. In addition, the application to depth profiling of thin films and multilayers is described; absolute removal rates and detection limits are also displayed. A discussion of possible mechanisms for low-power ablation is discussed.
Download or read book The application to laser ablation for solid sample introduction to inductively coupled plasma source mass spectrometry written by Steven F. Durrant and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Ablation inductively Coupled Plasma mass Spectrometry written by and published by . This book was released on 2011 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation provides a general introduction to Inductively coupled plasma-mass spectrometry (ICP-MS) and laser ablation (LA) sampling, with an examination of analytical challenges in the employment of this technique. It discusses the origin of metal oxide ions (MO+) in LA-ICP-MS, as well as the effect of introducing helium and nitrogen to the aerosol gas flow on the formation of these polyatomic interferences. It extends the study of polyatomic ions in LA-ICP-MS to metal argide (MAr+) species, an additional source of possible significant interferences in the spectrum. It describes the application of fs-LA-ICP-MS to the determination of uranium isotope ratios in particulate samples.
Download or read book Minor Minerals Major Implications Using Key Mineral Phases to Unravel the Formation and Evolution of Earth s Crust written by V. van Schijnde and published by Geological Society of London. This book was released on 2024-01-11 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation of key mineral phases such as zircon, apatite, titanite, rutile, monazite, xenotime, allanite, baddeleyite and garnet, explored in this book, has provided breakthroughs in our understanding of continental crust composition and evolution, as well as the timing, conditions, petrogenetic and geodynamic processes related to its growth and reworking. Therefore, the continuing development of analytical techniques, improvement of tools, data handling, processing, and interpretation allow us to extract and better understand these complex geological processes. This special publication aims at showcasing contributions reviewing the tools and applications of these key minerals, recent technique developments, and new applications using focused case studies investigating igneous, metamorphic and/or detrital rocks that help us put together the continental crust evolution puzzle. This volume highlights the progress made in studies using these key minerals and their future potential.
Download or read book Laser Ablation Inductively Coupled Plasma Mass Spectrometer LA ICP MS in Geosciences Further Improvement for Elemental Analysis written by Shitou Wu and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A quantitative reduction strategy consisting of Ratioing, Standardization, and Normalization (RSN) was proposed to process the LA-ICP-MS transient signal of NIST, MPI-DING, USGS and CGSG glass reference materials. The RSN strategy allows the quantitative reduction without knowing the concentration of internal standard prior to LA-ICP-MS analysis. The down-hole fractionations of the investigated glasses in initial 5-35s ablation period were insignificant and independent of the chosen internal standards under the given laser conditions. The analytical accuracy obtained from internal standardi...
Download or read book Applications of Laser Ablation Inductively Coupled Plasma Mass Spectrometry for Monitoring Impurities in Solid Foodstuff written by José Carlos Rodriguez Jule and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Developments in Laser Ablation inductively Coupled Plasma mass Spectrometry for Use in Geology Forensics and Nuclear Nonproliferation Research written by Joshua David Messerly and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
