Download or read book Polycyclic Aromatic Hydrocarbons in Indoor Air and Environmental Tobacco Smoke Measured with a New Integrated Organic Vapor particle Sampler Revision written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: To avoid sampling artifacts, an integrated organic vapor-particle sampler (IOVPS) has been developed for polycyclic aromatic hydrocarbons (PAH). The ICIVPS is based on an XAD-4-coated annular denuder which strips gas phase species from the air stream before collection of particles on a filter. A second denuder downstream of the filter collects species desorbed (''blown off'') the particles during sampling. PAH are determined in extracts of both denuders and the filter. For indoor air with no combustion sources, the gas-phase concentrations of several semivolatile PAH measured with the IOVPS averaged about half of those found with a conventional filter-sorbent bed sampler. For envirorunental tobacco smoke the gas-phase concentrations of the same PAH from the IOVPS averaged 70% of those found with the sorbent bed sampler. Particulate-phase concentrations were correspondingly higher with the IOVPS, but measurable ''blow off' semivolatile PAH occurred.
Download or read book Polycyclic Aromatic Hydrocarbons in Indoor Air and EnvironmentalTobacco Smoke Measured with a New Integrated Organic Vapor ParticleSampler written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: To avoid sampling artifacts, an integrated organic vapor-particle sampler (IOVPS) has been developed for polycyclic aromatic hydrocarbons (PAH). The ICIVPS is based on an XAD-4-coated annular denuder which strips gas phase species from the air stream before collection of particles on a filter. A second denuder downstream of the filter collects species desorbed (blown off'') the particles during sampling. PAH are determined in extracts of both denuders and the filter. For indoor air with no combustion sources, the gas-phase concentrations of several semivolatile PAH measured with the IOVPS averaged about half of those found with a conventional filter-sorbent bed sampler. For envirorunental tobacco smoke the gas-phase concentrations of the same PAH from the IOVPS averaged 70% of those found with the sorbent bed sampler. Particulate-phase concentrations were correspondingly higher with the IOVPS, but measurable blow off' semivolatile PAH occurred.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993-10 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas and Particulate Sampling of Airborne Polycyclic Aromatic Compounds written by and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The denuder surfaces of the gas and particle (GAP) sampler (developed at the Atmospheric Environment Service of Environment Canada) have been modified by coating with XAD-4 resin, using techniques developed at Lawrence Berkeley National Laboratory (LBNL) for the lower capacity integrated organic vapor/particle sampler (IOVPS). The resulting high capacity integrated organic gas and particle sampler (IOGAPS) has been operated in ambient air at 16.7 L min−1 for a 24-hour period in Berkeley, California, USA. Simultaneous measurements were made at the same collection rate with a conventional sampler that used a filter followed by two sorbent beds. Gas and particle partition measurements were determined for 13 polycyclic aromatic hydrocarbons (PAH) ranging from 2-ring to 6-ring species. The IOGAPS indicated a higher particle fraction of these compounds than did the conventional sampler, suggesting that the conventional sampler suffered from 'blow-off' losses from the particles collected on the filter.
Download or read book The Chemistry of Environmental Tobacco Smoke written by Roger A. Jenkins and published by CRC Press. This book was released on 2000-03-30 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts in the field, The Chemistry of Environmental Tobacco Smoke: Composition and Measurement, Second Edition compiles data on the properties of Environmental Tobacco Smoke (ETS) and on concentrations of its constituents in indoor air. The authors focus on common natural indoor environments and environments associated with chronic exposure. They stress measurement methods and competing sources of indoor air contaminants commonly attributed to ETS.
Download or read book Polycyclic Aromatic Hydrocarbons written by and published by National Academies Press. This book was released on 1983-01-01 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Determination of the Phase Distributions of Semi VolatilePolycyclic Aromatic Hydrocarbons Using Annular Denuders written by and published by . This book was released on 1994 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: An annular denuder-based sampler, here called the integrated organic vapor/particle sampler (IOVPS), has been developed for direct determination of both gas and particulate semi-volatile organic species. The IOVPS uses a cyclone inlet for removal of particles greater than 2.5 micrometers from the airstream, followed by two or three sandblasted glass annular denuders coated with ground particles of an adsorbent resin. The denuders trap the gas phase species of interest before the airstream passes through a filter and a backup denuder. Extracts of the denuders and filters are analyzed for the semi-volatile species of interest. The IOVPS has been tested and validated for sampling semi-volatile polycyclic aromatic hydrocarbons (PAH) in indoor laboratory room air and environmental tobacco smoke (ETS). Ground XAD-4 was the adsorbent for these initial studies. Gas- and particulate-phase concentrations of semi-volatile PAH are presented for these two environments. The new sampler provides the means for directly determining phase distributions of PAH and other classes of semi-volatile organic species, rather than by difference or by techniques that are subject to large positive and negative artifacts. For example, the results obtained with the IOVPS indicate that the volatilization artifact ('blow-off') from particulate PAH collected in indoor laboratory room air with a conventional filter-sorbent bed sampler at face velocity of 33 cm sec-1 led to three-fold underestimation of the particulate fractions of phenanthrene, pyrene and chrysene. Phase distributions for PAH in ETS are also reported here.
Download or read book Air Sampling Instruments for Evaluation of Atmospheric Contaminants written by Beverly S. Cohen and published by American Conference of Governmental Industrial Hygenists. This book was released on 1995 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a comprehensive guide to the sampling of airborne contaminants. Addresses both occupational and environmental air sampling issues and presents measurement methods for both gaseous and particulate air contaminants. This guide also shows available air sampling instruments and provides information for their use.
Download or read book The Chemistry of Environmental Tobacco Smoke written by Roger A. Jenkins and published by CRC Press. This book was released on 2000-03-30 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considered the definitive resource in its field, The Chemistry of Environmental Tobacco Smoke: Composition and Measurement compiles observations on the properties of Environmental Tobacco Smoke (ETS) and on the concentrations of its constituents in indoor air. It focuses on common natural indoor environments and environments associated with chronic exposure. The authors -- all renowned experts -- stress both measurement methods and the competing sources of indoor air contaminants commonly attributed to ETS. For the second edition, each chapter has been updated to reflect new studies and up-to-date information.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1994 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sampling Analysis and Data Validation of Indoor Concentrations of Polycyclic Aromatic Hydrocarbons PAH written by Francis J. Offermann and published by . This book was released on 1990 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Polycyclic Aromatic Hydrocarbons in Settled House Dust of Homes Exposed to Environmental Tobacco Smoke written by Richard Nathan Hunt and published by . This book was released on 2009 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pollution Abstracts written by and published by . This book was released on 1996 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.
Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1995 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the world's literature on meteorology, climatology, atmospheric chemistry and physics, physical oceanography, hydrology, glaciology, and related environmental sciences.
Download or read book The Environmental Toxicology of Polycyclic Aromatic Hydrocarbons Report written by Environmental Applications Group Limited and published by . This book was released on 1990 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polycyclic Aromatic Hydrocarbons written by Roland W. Frei and published by . This book was released on 1988 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Special issue" of Toxicological and Environmental Chemistry, vol. 16, no. 4. (1988).
