Last edited by Faujind
Tuesday, July 21, 2020 | History

2 edition of Collection of ambient atmospheric hydrocarbons on solid adsorbents found in the catalog.

Collection of ambient atmospheric hydrocarbons on solid adsorbents

Scott Alan Humrickhouse

Collection of ambient atmospheric hydrocarbons on solid adsorbents

by Scott Alan Humrickhouse

  • 236 Want to read
  • 15 Currently reading

Published .
Written in English

    Subjects:
  • Air -- Pollution -- Measurement.,
  • Hydrocarbons -- Testing.

  • Edition Notes

    StatementScott Alan Humrickhouse.
    The Physical Object
    Paginationix, 53 leaves :
    Number of Pages53
    ID Numbers
    Open LibraryOL16498497M

      Collection methods are needed for the organic pollutants having vapor pressures between 10{sup {minus}3} and 10{sup 0} torr because they are too volatile to be retained by high-volume collection methods using polyurethane foam (PUF) and are usually present in ambient air at levels below the detection limit of low-volume ://   Ambient Air Studies (). U. S. EPA Technical Assistance Document (5). 3. Summary of Method Ambi ent air analyses are performed as follows. A collection trap, as illustrated in Figure 1, is submerge d in either liquid oxygen or argon. Liquid argon is highl y recommended for use because of the safety hazard associated with liquid ://

    The concentration of VOCs in ambient air is influenced by various factors so the temporal changes in concentration are controlled by a combination of emission, deposition, chemical and photochemical reactions and meteorological conditions [].The two most common sampling techniques of VOCs in ambient air are pre-concentration on sorbent tubes and whole air collection in canisters or bags [25,26].   volumes of hydrocarbons, while rejecting interfering species such as water vapor and oxygen [13]. Tenax porous polymer [polyCp-2,6-diphenyleneoxider] is one of the most popular adsorbents for the collection of hydrocarbons greater than C2. It has been evaluated extensively for its ability to collect and release ad­ sorbed hydrocarbons [14, 15].

    The atmosphere is a particularly difficult analytical system because of the very low levels of substances to be analysed, sharp variations in pollutant levels with time and location, differences in wind, temperature and humidity. This makes the selection of an efficient sampling technique for air analysis a key step to reliable results. Generally, methods for volatile organic compounds the elution of PAHs from adsorbents, 10– 4 where 20 – 30 min of ultrasonication has typically been used to elute extracted PAHs from XAD resins,15 although insufficient recovery of PAHs is still a problem here. 12, 6 A solid-phase extraction (SPE) type collection device was developed for the collection of air borne PAHs,17 in which


Share this book
You might also like
Pattern Recognition and Image Processing (Handbook of Geophysical Exploration/Section 1, Seismic Exploration, Volume 20)

Pattern Recognition and Image Processing (Handbook of Geophysical Exploration/Section 1, Seismic Exploration, Volume 20)

Elements of library methods

Elements of library methods

Days and deeds

Days and deeds

Ethnic involvement in Australian soccer

Ethnic involvement in Australian soccer

Measurements in medicine

Measurements in medicine

Vilikens and his Dinah, or, The cup of cold pisen

Vilikens and his Dinah, or, The cup of cold pisen

How to design and install plumbing

How to design and install plumbing

Exotic Herbs

Exotic Herbs

Kent structure plan

Kent structure plan

The bird atlas

The bird atlas

Hearing of the 1991 senate and congressional redistricting for the San Joaquin Valley

Hearing of the 1991 senate and congressional redistricting for the San Joaquin Valley

Balasaraswati

Balasaraswati

Exmoor and other days

Exmoor and other days

Alfabet poetic

Alfabet poetic

Collection of ambient atmospheric hydrocarbons on solid adsorbents by Scott Alan Humrickhouse Download PDF EPUB FB2

Aimvspkerk Ennronmen. Vol- No. Printed m Great Britain. t ) COLLECTION OF CHLORINATED HYDROCARBONS IN URBAN AIR USING THREE SOLID ADSORBENTS W.

N EIL BILLINGS* and TERRY F. BIDLEMAN*H epartment of Chemistry, tBelle W. Baruch Institute for Marine Biology and Atmospheric Environment () Vol Issue 2,Pages HIgh volume collection of chlorinated hydrocarbons in urban air using three solid adsorbents.

Author   Apparent reaction products desorbed from tenax used to sample ambient air. Atmospheric The utility of distributed air volume sets when sampling ambient air using solid adsorbents. Evaluation of a tenax GC sampling procedure for collection and analysis of vehicle-related aromatic and halogenated hydrocarbons in ambient air.

Airborne polychlorinated biphenyls (PCB) and chlorinated pesticides were measured in Columbia, SC; Denver, CO and over a landfill at New Bedford, MA. At each location comparative sampling was carried out using porous polyurethane foam (PPF), Tenax-GC resin and XAD-2 resin.

Concentrations of light and heavy PCB (Aroclors and ), p, p'-DDE, chlordane and toxaphene measured using the Request PDF | Evaluation of solid adsorbent materials for cryogen-free trapping - gas chromatographic analysis of atmospheric C2-C6 non-methane hydrocarbons | Nine commercial solid adsorbent   The utility of distributed air volume sets when sampling ambient air using solid adsorbents.

Atmospheric Environment ()18 (4), DOI: /(84) Alberto J. Nún˜ez, Luis F. Gonza´lez, Jaroslav Jana´:// Castellnou A., Gonzalez-Flesca N., Grimalt J.O. () On-Site Comparison of Canister and Solid-Sorbent Trap Collection of Highly Volatile Hydrocarbons in Ambient Atmospheres. In: Sokhi R.S.

(eds) Urban Air Quality: Monitoring and ://   Evaluation of solid adsorbent materials for cryogen-free trapping—gas chromatographic analysis of atmospheric C2–C6 non-methane hydrocarbons.

Journal of Chromatography A(), DOI: / Sandra Beghi, Jean-Michel ://   HIgh volume collection of chlorinated hydrocarbons in urban air using three solid adsorbents. Atmospheric Environment ()17 (2), DOI: /(83)   Collection and analysis of trace organic vapour pollutants in ambient atmospheres. Journal of Chromatography A(1), DOI: /S(00) Toshiyuki Tanaka.

Chromatographic characterization of porous polymer adsorbents in a trapping column for trace organic vapor pollutants in ://   hydrocarbons at ambient temperatures, but are compatible with both apolar and polar compounds and offer quantita-tive retention of organics ranging in volatility from C 3 hy-drocarbons Some inorganic vapors such as N 2O and CS 2 can also be quantitatively retained at ambient temperatures.2 Figure :// The collection and measurement of VOCs has been the subject of countless studies.

Europe to determine concentrations of nonmethane hydrocarbons (NMHCs) in ambient air. from atmospheric   preconcentration techniques are cryogenic collection and the use of solid adsorbents. The method described herein involves the former technique.

Definitions Definitions used in this document and any user prepared SOPs should be consistent with ASTM D(6). All abbreviations and symbols are defined within this document at the point of use. ://    Methods of sampling. The first step of monitoring of VOCs is the collection of air sample.

Different methods of VOC sampling in air are practiced worldwide for this purpose (Demeestere et. al., ).Active sampling is done by drawing a specified volume of the air using a pump through an adsorbent tube with a constant, usually low air flow rate.

In some cases sampling can be done for Seasonal Variation of Atmospheric Polycyclic Aromatic Hydrocarbons (PAHs) on Anmyeon Island Article (PDF Available) in Ocean and Polar Research 31(2) June with 67 Reads   A canister-based sampling technique was combined with solid adsorbents to develop a method for the determination of 52 volatile organic hydrocarbons (VOCs), including alkanes, alkenes, aromatics and terpenes, in ambient air at pptv levels of concentration.

The volatility of components ranged from propane to that of 1,2,:// organic compounds in ambient air”, EPA / In an e ort to keep these methods consistent with current technology, Method TO has been revised and updated as Method TOA “determination of polycyclic aromatic hydrocarbons (PAHs) in ambient air using gas chromatog-raphy/mass spectrometry (GC/MS)”.

This ?file_no= Technical Report: Comparison of solid-adsorbent sampling techniques for volatile organic compounds in ambient air Keller, C.D. and Bidleman, T.F.:Collection of Airborne Polycyclic Aromatic Hydrocarbons and Other Organics with a Glass Fiber Filter-polyurethane Foam System, Atmospheric Environm Ambient level volatile organic compound (VOC) monitoring using solid adsorbents - Recent US EPA studies Article in Journal of Environmental Monitoring 4(5) November with 58 Reads.

However, A/F may overestimate or underestimate V/P with the collection of solid phase PAHs on filters and gas phase PAHs on adsorbents due to sampling effects/artifacts (Bidleman et al., ). Researchers have paid much attention to the filter artifact of ://A method has been developed for the collection and analysis of polar and non‐polar C 4 ‐C 14 hydrocarbons involved in the formation of photochemical smog.

Enrichment of hydrocarbons from both polluted and unpolluted areas has been achieved with three‐stage traps packed with carbon adsorbents of different surface area; the use of a home‐made desorption unit employing cryofocusing then Ambient air or gas streams (including stack emissions and fugitive emissions) are sampled to determine the presence of, and concentrations of, gaseous pollutants by use of the following equipment and mechanisms.

Vacuum pumps, hand operated or automatic • Vacuum release of an evacuated collection container • Tedlar bags • Adsorption on a solid