Download or read book Laser Microprobe Mass Spectrometry Studies of Polycyclic Aromatic Hydrocarbons in Soils Sediments and Interstellar Ice Analogs written by John Sebastian Gillette and published by . This book was released on 2000 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Mass Spectrometry Studies of Complex Aromatics in Terrestrial Samples and Laboratory Analogs written by Tania Baldev Mahajan and published by . This book was released on 2002 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Astrochemical Studies of Polycyclic Aromatic Hydrocarbons and Fullerenes written by Jamie Elizabeth Elsila and published by . This book was released on 2004 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods of Analysis by the U S Geological Survey National Water Quality Laboratory written by Mary C. Olson and published by . This book was released on 2004 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polycyclic Aromatic Hydrocarbons and Astrophysics written by A. Léger and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: The near Infra-Red emission of the Interstellar Medium is a very puzzling subject. In the brightest regions, where spectroscopic observa tions are possible from the ground, several bands (3.3 - 3.4 - 6.2 - 7.7 - 8.6 - 11.3 ~m) have been observed since 1973. The absence of satisfying explanation was so obvious that they were called "Unidenti fied IR Emission Bands". The puzzle still increased when were known the first results of the general IR sky survey made by the satellite IRAS. On a large scale, the near IR emission of the Interstellar medium was expected to be very small but it was observed to be about one third of the total IR emission for our own galaxy ..• The situation has moved in 1984 when it was suggested that a class of stable organic molecules, the Polycyclic Aromatic Hydrocarbons (PAH's) could be at the origin of this near IR emission. Initially based on the required refractory character of particules that should be heated to high temperature without subliming, this hypothesis leads to a sugges tive spectroscopic similarity with the observed astronomical bands. This hypothesis is attractive and it has many implications, for ins tance, the PAHs would be the most abundant organic molecules in the universe. However, many points have to be clarified and the different consequences of this suggestion should be explored.

Download or read book Measurement of Polycyclic Aromatic Hydrocarbons in Soils and Sediments by Partical beam high performance Liquid Chromatography mass Spectrometry written by Chris M. Pace and published by . This book was released on 1991 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Polycyclic Aromatic Hydrocarbons in Soils and Sediments by Particle beam high performance liquid Chromatography mass Spectrometry written by C. M. Pace and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicological Profile for Polycyclic Aromatic Hydrocarbons written by and published by . This book was released on 1993 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2001 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Time of flight Mass Spectrometry of Arsenic Compounds Chromium Compounds and Polycyclic Aromatic Hydrocarbons in Airborne Particulate Matter written by Catherine Hayes Smith and published by . This book was released on 1993 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Polycyclic Aromatic Hydrocarbons in Geochemical Materials by Two step Laser Mass Spectrometry written by Michael Richardson Wing and published by . This book was released on 1991 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Time of Flight Mass Spectrometry Method for the Screening of Polycyclic Aromatic Hydrocarbons and Nitro substituted Polycyclic Aromatic Hydrocarbons written by J. Suro and published by . This book was released on 2000 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Post ionisation Time of flight Mass Spectrometry of Polycyclic Aromatic Hydrocarbons written by Steven Mark Hankin and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Polycyclic Aromatic Hydrocarbons by Gas Chromatography mass Spectrometry and Method Development in Supercritical Fluid Chromatography written by Jari Tuominen and published by . This book was released on 1990 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Gas Chromatography Mass Spectrometry for the Detection of Polycyclic Aromatic Hydrocarbons and Nitropolycyclic Aromatic Hydrocarbons in Soil and Diesel Particulate Matter written by Mario J. Mena (Jr) and published by . This book was released on 2018 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particular matter (PM, e.g. soot, dust etc.) of a certain size is known to be hazardous to human health. These particles are small enough to travel through our respiratory system and induce respiratory illness by introducing foreign bodies and toxic chemicals to our systems. For instance, benzo(a)pyrene (BaP), is an example of a polycyclic aromatic hydrocarbon (PAH) frequently found in or on PM known to have carcinogenic and mutagenic effects. Polycyclic aromatic hydrocarbons are by-products of incomplete combustion such as vehicle emissions. Thus, when PM are airborne, they can interact with semi-volatile molecules such as PAH. In turn, the newly coupled system may penetrate our respiratory system. In addition to PAH, nitro polycyclic aromatic hydrocarbons (NPAHs, i.e. 1-nitro-pyrene) are being recognized by the International Agency for Research on Cancer as a Group 2a compound (probably carcinogenic to humans). This study aims to identify chemical signatures of forest fire and automobile emissions using ratios of PAH and its oxidants, including nitro-PAH, in a variety of media (e.g. soil, soot, PM). Nitro-PAH (NPAHs) are usually found in/on course/fine particular matter at concentrations on the order of 2ng/mL to 200ng/mL (Heidelore et al. 1991, Eiguren-Fernandez et al 2004). Therefore, a very sensitive technique is needed to detect NPAHs in various matrices representative of those found in the environment. This study will use the following PAH ratios to differentiate sources of incomplete combustion: B[a]P to (B[a]P+chrysene; pyrene to B[a]P; fluoranthrene to pyrene; and fluoranthrene to (fluoranthrene+pyrene). As for the NPAH:PAH ratios, the following will be used: 1-nitro-pyrene to pyrene; 6-nitro-chyresene to chrysene; and 6-nitro-benzo[a]pyrene to benzo[a]pyrene. Extractions of PAH will be performed using the accelerated solvent extraction technique. Gas chromatography-mass spectroscopy will be used to identify and quantify analytes. The results of this study may be used to inform citizens, city planners and lawmakers about the impacts of high-traffic events on human health.

Download or read book Characterization of Polycyclic Aromatic Hydrocarbons and Chlorinated Polycyclic Aromatic Hydrocarbons in Soots by Laser Desorption Laser Photoionization Mass Spectrometry written by Mary Katherine Garland Young and published by . This book was released on 1991 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spectral Atlas of Polycyclic Aromatic Compounds written by W. Karcher and published by Springer. This book was released on 2012-11-13 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the 3rd in a series of comprehensive publications devoted to the molecular spectra and environmentally important properties of polycyclic aromatic compounds which constitute one of the most interesting classes of environmental carcinogens. Since the first identification of dibenz(a,h)anthracene and later benzo(a)pyrene as chemical carcinogens in the 1930's, the number of publications devoted to this ubiquitously occurring group of compounds has increased constantly. Therefore, this reference source for the spectral, physicochemical and en vironmentaJ properties of polycyclic aromatic compounds should be a welcome addition to the previous volumes for scientists engaged in the investigation, characterisation and control of this hazardous class of pollutants. As was the case with the preceding volume, this publication is the fruit of a close collaboration within the General Directorate for SCience, Research and Development of the Commission of the European Communities between the Environment Institute of the Joint Research Centre Ispra, the Community Bureau of Reference and expert laboratories in the member states. F. Geiss Director of the Environment Institute JRC Ispra 1. Introduction Polycyclic Aromatic Compounds (PAC) are an important class of carcinogenic environmental pollutants, which occur in air, water, soils, sediments, in food and in the work area. Because many hundreds of closely related isomers are being formed and released in the environment from combustion processes of fossil fuels and other organic materials, their environmental and health con trol presents a difficult task.