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Showing 1 to 20 of 299 for “"Elemental analysis"”.
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Laser induced emission spectrometry for rapid elemental analysis.
… laser-induced emission spectrometry for rapid elemental analysis. An integrated laser and spectrometer system is configured, comprising a Q-switched Nd:YAG laser and an optical multichannel analyser, which enables the discreet monitoring of the laser-induced plasma produced by each laser shot. …
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Elemental analysis by neutron time-of-flight spectrometry
… common elements for which neutron activation analysis is not sufficiently sensitive, are carbon, nitrogen and oxygen. These elements are so important that they were selected for study in an attempt to extend the advantages of nuclear methods of analysis to their determination. The physical …
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Radioanalytical multi-elemental analysis : new methodology and archaeometric applications
… application of instrumental neutron activation analysis (INAA) and rigorous statistical analyses to the sourcing of Egyptian limestone and Kenyan obsidian, and the development of a method to determine titanium, barium, and arsenic concentrations in obsidian using epithermal neutron activation. …
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Elemental analysis by alpha-induced prompt gamma-ray spectrometry
Alpha-induced prompt gamma-rays generated by excitation, or in nuclear reactions, were studied for 57 elements, to select those elements having gamma-rays of sufficient intensity for analytical application. Several light, medium and heavy elements show promise. Of these nitrogen, fluorine, …
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Investigation of elemental analysis using neutron-capture gamma ray spectra.
Massachusetts Institute of Technology. Dept. of Nuclear Engineering. Thesis. 1969. Ph.D.
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Synchrotron dendrochemistry: Exploring the comparison of multi-dimensional elemental analysis methodologies on tree cores using synchrotron techniques
… the results obtained from two heavy metal analysis methodologies used in dendrochemistry; XRF and ICP-MS. Using a synchrotron, we obtained results of what elements were present in the wood by measuring photons emitted by the individual elements when excited by incident X-rays. Using ICP-MS …
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Development of techniques for high-resolution spatially-resolved elemental analysis in materials of interest in luminescence dating
… in a number of archaeological materials. Digital analysis and mineralogical staining techniques were combined to provide initial data regarding matrix heterogeneity and the distribution patterns of potassium-bearing minerals and in some cases, provided data that were comparable to those derived …
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Evaluation of the theta pinch as a sampling and excitation source for elemental analysis of solid refractory materials
… as a sampling and excitation source for elemental analysis of refractory solids. Previous work demonstrated the ability of the discharge to produce spectra suitable for qualitative analysis, but quantitation could not be demonstrated due to insufficient and irreproducible sampling. It was …
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A Multi-instrument Investigation of Pigments, Binders and Varnishes from Egyptian Paintings (AD 1300-1900): Molecular and Elemental Analysis Using Raman, GC-MS and SEM-EDX Techniques
The focus of this study was analytical investigations of Egyptian paintings, mainly Coptic icons and Islamic wooden ceilings, dating from 1300-1900 using multiinstrumental techniques. Twenty three Coptic icons and three wooden ceilings dated from different periods and painted by different painters …
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Synthesis and Characterization of Alkyl Tetra-, Tri-, and Triskaidecazirconates
… as [Zr3O](OPrn) 10 by 13C NMR spectroscopy and elemental analysis. Ethanolysis of [Zr3O](OPrn) 10 yielded the ethoxy derivative of the trizirconate which was characterized by 13C NMR spectroscopy and elemental analysis. Reaction of the trizirconates with the parent alcohol resulted in the …
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Synthesis, characterization, biological and catalytic studies of tridentate monothiosemicarbazone palladium (II) complexes
… spectroscopies, as well as mass spectrometry and elemental analysis in the case of ligand 3-terl.-butyl-2-hydroxy-benzaldehyde thiosemicarbazone, which is a new compound. Four of these ligands were reacted with precursors of type Pd(L)2CI2 yielding eight tridentate thiosemicarbazone Pd(II) …
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Analysis of Kyrock for Leaching of Impurities in Synthetic Rainwater
… using scanning electron microscopy to obtain elemental analysis. High levels of carbon indicate the presence of organic compounds. Analysis of an acid digestion of the samples using inductively coupled plasma spectroscopy showed inorganic compounds such as titanium oxide, vanadium oxide along …
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Modeling Diiron enzymes for alkanes activation
… by IR, 1H and 13C NMR spectroscopy, elemental analysis as well as by mass spectrometry.
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One Electron Reduction of Sulfonium Salts: A Mechanistic Study
… comparison to authentic material, and/or elemental analysis. The systems studied were acyclic (1), cyclic (2), and benzofused cyclic (3) sulfonium salts.
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Oligomerization of higher olefins
… techniques such as NMR, mass spectrometry, elemental analysis and melting points.The ligands were then tested for the oligomerization of ethylene and 1-hexene. The chromium complexes were tested for the oligomerization of 1-hexene.
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The application of novel multinuclear catalysts derived from dendrimeric ligands in the polymerization and oligomerization of unsaturated hydrocarbons
… using FTIR, 1H NMR and 13C NMR spectroscopy, elemental analysis and ESI mass spectrometry. The dendrimeric ligands were converted to multinuclear nickel complexes by reaction with nickelacetate. The metal complexes were characterized by FTIR spectroscopy, elemental analysis and ESI mass …
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The synthesis, characterization and reactivity of metallacycloalkanes and their precursors
… by 1 Hand 31 P NMR spectroscopy and elemental analysis. The dibromido complexes were then used in the preparation of osmium bis(alkenyl) and osmacycloalkane complexes.
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