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Thursday, April 23, 2020 | History

2 edition of study of trace contaminant identification by microwave double resonance spectroscopy found in the catalog.

study of trace contaminant identification by microwave double resonance spectroscopy

Richard J. Volpicelli

study of trace contaminant identification by microwave double resonance spectroscopy

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  • 30 Currently reading

Published by National Aeronautics and Space Administration; for sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va. in [Washington] .
Written in English

    Subjects:
  • Microwave spectroscopy.

  • Edition Notes

    Statementby Richard J. Volpicelli, Otto L. Stiefvater, and George W. Flynn.
    SeriesNASA contractor report,, NASA CR-967
    ContributionsStiefvater, Otto L., joint author., Flynn, George W., joint author., Research Systems, inc., Langley Research Center.
    Classifications
    LC ClassificationsTL521 .3.C6A3 no. 967
    The Physical Object
    Paginationiii, 97 p.
    Number of Pages97
    ID Numbers
    Open LibraryOL5634573M
    LC Control Number68061571

    Novel field robots and robotic exoskeletons: design, integration, and applications. Pinhas Ben-Tzvi. As natural and man-made disasters occur, from earthquakes, tornados, and hurricanes to chemical spills and nuclear meltdowns, there is a need for field robotic systems that are able to respond in these hazardous and dangerous environments. Trace metal analysis by laser ablation-inductively coupled plasma-mass spectrometry and x-ray K-edge densitometry of forensic samples The strands in this study are spatially heterogeneous in trace element composition. In actual forensic applications, The introduction of atomic spectroscopy methods allowed for the quantification.   Goals / Objectives The goals of this project are to use inductively coupled plasma -Mass Spectroscopy (ICP-MS) available in the School of Agricultural and Environmental Sciences (SAES) to develop a rapid detection methodology for the quantification of trace metals including mercury, cadmium, arsenic and other heavy metal contaminants. ICP-MS is not recognized as the standard method for .


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study of trace contaminant identification by microwave double resonance spectroscopy by Richard J. Volpicelli Download PDF EPUB FB2

Tems Inc. was the development and investigation of double resonance microwave spectroscopy as a possible means of contaminant detection.

search consisted of three parts: The proposed re- 1. The development and construction of a double resonance microwave spectrometer. The determination of the optimal experimental conditions for observ. A study of trace contaminant identification by microwave double resonance spectroscopy, Author: Richard J Volpicelli ; Otto L Stiefvater ; George W Flynn ; Research Systems, Inc.

; Langley Research Center. Trace contaminant identification using microwave double resonance spectroscop Topics: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR Year: Double Resonance Spectroscopy for Remote Sensing of Trace Molecular Gases collisional physics in the microwave/microwave and infrared/millimeter wave regions [1 - 7].

Although wavelength- Keywords: Double Resonance Spectroscopy, Chemical Remote Sensing, Trace Gas Detection. microwave double resonance spectroscopy (AMDOR),10 microwave spectral taxonomy,14 and pattern recognition methods were extensively used.

Several. A new method for highly selective remote sensing of atmospheric trace polar molecular gases is described. Based on infrared/terahertz double resonance spectroscopic techniques, the molecule-specific coincidence between the lines of a CO 2 laser and rotational-vibrational molecular.

Microwave Spectroscopy. The trigger channel information is used to identify the margins of the sweep. The initial estimate of the frequency range is obtained from the data of the high-voltage ramp channel by comparison to the stored BWO frequency–voltage characteristics.

Thus microwave-optical double resonance (MODR) uses optical (say. Rotational Resonance (FT-MRR) Spectroscopy The simplicity of FTIR, the power of Mass Spec Direct Analysis of Complex Mixtures Impurities in gases, Environmental analysis, Semicon processes Reprogrammable Sensors for Multispecies Monitoring Residual solvent analysis, Genotoxicity testing, Environmental Monitoring.

Electron Paramagnetic Resonance Spectroscopy. and 15 mW microwave power at 12 K. Trace 2 shows the Fe protein in the presence of MgATP ( mM) under the same spectra conditions as trace.

This manuscript presents the results of the International Measurement Evaluation Programme 40 (IMEP) study, a proficiency test (PT) which was organised to assess the worldwide performance of laboratories for the determination of trace elements in seawater.

This PT supports the implementation of the European Union Water Framework Directive /60/EC, which aims at Cited by: 3. 2 INFRARED SPECTROSCOPY mind is that a successful interpretation is based not only on the presence of particular bands within the spectrum, but also the absence of other important bands.

Complete classes of compounds can be rapidly excluded during the interpretation by the use of no-band information. It must be understood that this article addresses. A variety of frequency-modulation methods for high-sensitivity absorption detection of gas-phase species has evolved in recent years.

The distinctions among these methods are mostly semantic. The mathematical derivations for wavelength-modulation spectroscopy and one- and two-tone frequency-modulation spectroscopies are presented; a common terminology is used to permit a comprehensive.

This chapter reviews the recent progress made in the use of trapped ions for study of trace contaminant identification by microwave double resonance spectroscopy book, quantum optics, and frequency standards. It is clear that techniques using trapped ions are complementary to other spectroscopic techniques, offering significant advantages under some circumstances, but Cited by: Present and Future Challenges in Food Analysis: Foodomics The state-of-the-art of food analysis at the beginning of the 21st century is presented in this work, together with its major applications, current limitations, and present and foreseen challenges.

“Automated microwave double resonance spectroscopy: A tool to identify and characterize chemical compounds” | Marie-Aline Martin-Drumel, Michael C.

McCarthy, David Patterson, Brett A. McGuire, and Kyle N. Crabtree | The Journal of Chemical Physics Vol. Is DOI: /   Current industrial-scale distillers rely on a spectroscopy technique called mass spectroscopy that measures molecular mass to identify individual compounds and their concentrations.

Although mass spectroscopy is a powerful technique, it is burdened with slow turnaround (time needed to get an answer) and it can only identify compounds for which Author: Robin Felder.

The objective of the present study was to investigate trace metal levels of different varieties of fresh water fish using Inductively Coupled Plasma Mass Spectrophotometer after microwave digestion (MD-ICPMS). Fish samples were collected from Cited by: 5. Contents Double Bond Equivalents The Interaction of Electromagnetic Radiation with Molecules Instrumentation Chromophores Applications of UV Spectroscopy Selection Rules and the Beer-Lambert Law Instrumentation Characteristic Group Vibrations Selection Rules and Hooke's Law 1 4 7 8 10 19 24 26 27 Nuclear magnetic resonance (NMR) is arguably the most powerful and versatile tool in modern science.

It has the capability to solve complex structures and interactions in situ even in complex heterogeneous multiphase samples such as soil, plants, and tissues.

NMR has vast potential in environmental research and can provide insight into a diverse range of environmental processes at the Cited by:   Abstract. Consumer concerns and government regulations focused on the safety of foods dictate the need for analysis of various food contaminants, residues, and chemical constituents of compounds include pesticide residues, mycotoxins, antibiotic residues, GMOs, allergens, food adulterants, packaging material hazardous chemicals, environmental contaminants, and certain Cited by: 2.

Ultraviolet and Visible Spectroscopy Nature of Electronic Transitions Principles of Absorption Spectroscopy The molecular spectroscopy is the study of the interaction of electromagnetic waves and matter.

traveling through space is represented by a sinusoidal trace. Collections of articles on portable spectroscopy can be found in a recent special issue of Applied Spectroscopy, 2 the SPIE conference series “Next-Generation Spectroscopic Technologies,” 42 –46 and a series of general review articles on field spectroscopy in John Wiley’s Encyclopedia of Analytical Chemistry.

47 The use of portable. Optical Double-Resonance Spectroscopy of Cesium Atoms in a Magneto-Optical Trap. Tunable Infrared Laser Sources for Spectroscopy and Atmospheric Trace Gas Detection. A New Method for the Identification of Inner-Shell Autoionizing States by.

Maeda et al. have used a method of optical-microwave double-resonance spectroscopy to study the highly excited Rydberg states of ytterbium.

In Refs. In Refs. [ 24, 25 ], the methods of two-photon ionization and three-photon polarization spectroscopy have been applied to studying the autoionization states (ASs) of the ytterbium by: 2.

Nuclear Magnetic Resonance spectroscopy is an extremely powerful and useful tool in performing experiments on the nuclei of atoms. NMR is defined by The American Heritage Dictionary as “The absorption of electromagnetic radiation of a specific frequency by an atomic nucleus that is placed in a strong magnetic field, used especially in spectroscopic studies of molecular structure and in.

The Microwave Laboratory. Main menu. Adventures in the Submillimeter Persons, C. M., De Lucia, F. & Everitt, H. Design and signature analysis of remote trace-gas identification methodology based on infrared-terahertz Tanner, E.

A., De Lucia, F. & Everitt, H. Infrared-terahertz double-resonance spectroscopy of CH 3 F and CH 3. Introduction. Although metallomics has become a well established field, there are only a few methods for measuring in situ cellular metal speciation. We have used high magnetic field (3 and 10 teslas) high microwave frequency (95– GHz) electron paramagnetic resonance (HFEPR) 3 spectroscopy to identify and measure Mn(II) species in intact cells of Deinococcus radiodurans, a Cited by: Residual traces of the metals copper and lead on an individual's skin may be elucidated by reaction of rubeanic acid with a gelatine lift taken from the target area in question, yielding intensely coloured reaction products.

This non-invasive technique has been Cited by: 3. “Together with ultraviolet/visible (UV/Vis), infrared (IR), and nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry (MS) is a key technology in the identification of unknown compounds” could be the opening sentence of an undergraduate course on the use of analytical techniques to identify unknown small organic by: This double resonance technique has now been adapted as a new means for remotely identifying the constituents of a trace gas cloud at distances up to 1 km.

4) Terahertz Imaging. This newest activity uses powerful, cw, tunable millimeter- and submillimeter-wave sources to adapt various coherent imaging techniques to the terahertz spectral region.

Microwave spectroscopy is a powerful tool for chemical sensing because it detects chemicals on the basis of their rotational transition spectra.

A molecule’s rotational transitions are directly related to its physical structure and can be predicted by quantum physics. Raman spectroscopy (/ ˈ r ɑː m ən /); (named after Indian physicist C. Raman) is a spectroscopic technique typically used to determine vibrational modes of molecules, although rotational and other low-frequency modes of systems may also be observed.

Raman spectroscopy is commonly used in chemistry to provide a structural fingerprint by which molecules can be identified. A nuclear magnetic resonance study of the dynamics of organofluorine interactions with a dissolved humic acid.

Chemosphere, Simpson A. NMR Spectroscopy in Environmental Research, Magnetic Resonance in Chemistry– Editor of Special Issue (Invited) including to identify and analyze foods, have multiply by three their use in food analysis; one technique, PCR, constitutes a 60% of the total applications in biological techniques being around double of the total number of biological techniques used in the previous period.

This huge increase in the. EPA/ January EVALUATION OP A MICROWAVE-INDUCED PLASMA SPECTROMETER FOR TRACE ANALYSIS by William Rudolf Seitz Southeast Environmental Research Laboratory College Station Road Athens, Georgia ROAP 16ADN Program Element 1BA NATIONAL ENVIRONMENTAL RESEARCH CENTER OFFICE OF RESEARCH AND.

CHAPTER 6 Proper Laboratory Protocols for FAAS and ICP-MS The operation of ICP and FAAS instruments requires hands on experience, even though studying the various components of instrument and understanding the theory is very important.

Experiential learning is a must for most students, especially when dealing with analytical Size: KB. A widely used portable technique for rapid identification of unknown compounds is Raman spectroscopy. This article covers the two most common mathematical representations used with handheld Raman spectroscopy as decision making tools for spectroscopic data, which are Hit Quality Index (HQI) and significance level (p-value).Author: B&W Tek.

A new diagnostic approach using multi-mode microwave cavity resonance spectroscopy (MCRS) is introduced. This can be used to determine electron dynamics non-invasively in an absolute sense, as a function of time and spatially resolved. Absorption spectroscopy refers to spectroscopic techniques that measure the absorption of radiation, as a function of frequency or wavelength, due to its interaction with a sample absorbs energy, i.e., photons, from the radiating field.

The intensity of the absorption varies as a function of frequency, and this variation is the absorption spectrum. Microwave spectroscopy of a quantum-dot molecule The resonance in the lowest trace in Fig.

1c is due to an alignment of discrete states. The other traces are measured while applying a. Atomic absorption spectroscopy is now a well-established technique for the determination of trace elements covering a wide range of analyte types. The early theory and instrumentation chapters incorporate recent trends in instrumental design and methodology, in particular those associated with electrothermal techniques and background correction.The chemical constituents of plants are complicated, and monomeric compounds must be obtained via extraction and isolation before structure identification, bioactivity screening, and so on.

In recent years, the new technologies and methods of the extraction, isolation, and structural identification have come forth, which promote the speed of extraction and analysis of : Weisheng Feng, Meng Li, Zhiyou Hao, Jingke Zhang.The objective of the present study was to investigate trace metal levels of different varieties of fresh water fish using Inductively Coupled Plasma Mass Spectrophotometer after microwave digestion (MD-ICPMS).

Fish samples were collected from the outlets of twin cities of Hyderabad and Secunderabad. The trace metal content in different varieties of analyzed fish were ranged from to &# Cited by: 5.