classification volatile organic compounds
Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells pdf
Ngày tải lên :
14/03/2014, 19:20
... molecular configuration and composition of some of the compounds discussed in this report The Quality of Our Nation’s Waters Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water ... : volatile organic compounds in the nation’s ground water and drinking-water supply wells / by John S Zogorski [et al.] p cm (Circular 1292) Includes bibliographical references and index Organic ... occur naturally in the environment, other compounds occur only as a result of manmade activities, and some compounds have both origins V olatile organic compounds (VOCs) are ground-water contaminants...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
Ngày tải lên :
14/03/2014, 20:20
... 100 Where: V = weight fraction of non-exempted volatile organic compounds in the non-propellant portion n = number of non-exempted volatile organic compounds in the non-propellant portion WL = ... section 94500, and (2) low vapor pressure -volatile organic compounds (LVP-VOC) as that term is defined in section 94508(a), and (3) the reactive organic compounds (ROC) contained in aerosol coating ... METHOD 310 DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS APPLICABILITY 1.1 This...
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Source Identification of Volatile Organic Compounds in Houston, Texas pdf
Ngày tải lên :
22/03/2014, 14:20
... the PTR-MS is the reaction of organic species in ambient air with H3O+ ions, generated from the hollow cathode discharge of water vapor, to produce the protonated organic species (RH+) The concentration ... 0.047, 0.016, 0.835, 0.360, and 0.089, respectively Here M43, M61, and M87 denote the classes of compounds with the mass/charge values of 43, 61, and 87, respectively In this study, the dominant ... practical since it produces satisfactory analysis results Finally, the estimated uncertainties for the compounds in this study, acrylonitrile, isoprene, benzene, toluene, styrene, c8-benzenes (with the...
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Total Volatile Organic Compounds (WOC) in Indoor Air Quality Investigations doc
Ngày tải lên :
28/03/2014, 19:20
... Classzjication of indoor organic pollutants (WHO, 1989) Category Description Abbreviation Very volatile (gaseous) organic compounds VVOC Volatile organic compounds VOC organic compounds associated ... complex mixture of volatile organic compounds Neurotoxicol Teratol 12,649-652 Rothweiler H., Wager P.A and Schlatter C., 1992 Volatile organic compounds and some very volatile organic compounds in ... Brussels Luxembourg, 1997 Printed in Italy The amount of volatile organic compounds in indoor air, often called TVOC (total volatile organic compounds) , has been measured for various purposes using...
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Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area potx
Ngày tải lên :
28/03/2014, 20:20
... reactivity for the measured VOC compounds is 19.7 s−1 Atmos Chem Phys., 10, 2353–2376, 2010 2362 E C Apel et al.: Chemical evolution of volatile organic compounds Fig The top 20 compounds measured at T0 ... future publication The 32 compounds TOGA targeted included OVOC, NMHC, halogenated organic compounds and acetonitrile Simultaneous measurements were obtained for all compounds every 2.8 Measurement ... www.atmos-chem-phys.net/10/2353/2010/ E C Apel et al.: Chemical evolution of volatile organic compounds Fig The top 20 compounds measured at T0 (top panel) and T1 (lower panel) in terms of mixing...
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Báo cáo y học: " Exhaled volatile organic compounds in patients with non-small cell lung cancer: cross sectional and nested short-term follow-up study" pptx
Ngày tải lên :
12/08/2014, 18:21
... Diagnostic potential of breath analysis – focus on volatile organic compounds Clin Chim Acta 2004, 347:25-39 Imbriani M, Ghittori S: Gases and organic solvents in urine as biomarkers of occupational ... to identify new biomarkers of inflammatory and oxidative lung processes, and different volatile organic compounds (VOCs) of endogenous or exogenous origin have been analyzed to study lung diseases ... U S A 1971, 68:2374-2376 Gordon SM, Szidon JP, Krotoszynski BK, Gibbons RD, O'Neill HJ: Volatile organic compounds in exhaled air from patients with lung cancer Clin Chem 1985, 31:1278-1282 Humphrey...
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Estimation of emissions of nonmethane organic compounds from a closed landfill site using a landfill gas emission model
Ngày tải lên :
05/09/2013, 16:11
... components of landfill gases are classified as nonmethane organic compounds (NMOCs) or nonmethane hydrocarbons (NMHCs) [3] Volatile organic compounds (VOCs) are important component of NMOC which ... the fact that volatile organic compounds (VOCs), a major group of NMOC are recognised to be highly carcinogenic even in low concentration [16]; are the main reasons nonmethane organic compound ... potential hazards of explosion, asphyxiation and toxicity from methane, carbon dioxide, and volatile organic compounds respectively The generation of methane and carbon dioxide from landfills has...
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Tài liệu ADSORPTION OF ORGANIC COMPOUNDS doc
Ngày tải lên :
14/02/2014, 03:20
... heterogeneous mixtures of compounds using group parameters such as total organic carbon (TOC), dissolved organic carbon (DOC), chemical oxygen demand (COD), dissolved organic halogen (DOX), UV ... from single-solute tests in organic- free water In natural waters, the organic matter present is a complex mixture of many different compounds; representing each of these compounds, even if they could ... † † * * * * † * † * † † † * † * * 13.21 ADSORPTION OF ORGANIC COMPOUNDS TABLE 13.1 Freundlich Adsorption Isotherm Parameters for Organic Compounds (Continued) Compound DDE Acridine yellow p-Xylene...
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Tài liệu Human-induced changes in US biogenic volatile organic compound emissions: evidence from long-term forest inventory data ppt
Ngày tải lên :
14/02/2014, 08:20
... rates (mg mÀ2 hÀ1) for isoprene and monoterpenes, compared with heatwave anthropogenic volatile organic compounds (VOC) emission rates Anthropogenic emissions taken from the EPA AIRS data Estimates ... per decade) for isoprene and monoterpenes, compared with decadal change in anthropogenic volatile organic compounds (VOC) emissions Change estimate given by model B2 (Methods) driven separately ... 16, 17–24 Guenther AB, Geron C, Pierce T et al (2000) Natural emissions of non-methane volatile organic compounds; carbon monoxide, and oxides of nitrogen from North America Atmospheric Environment,...
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Tài liệu NOMENCLATURE OF ORGANIC COMPOUNDS docx
Ngày tải lên :
14/02/2014, 08:20
... (methoxyethane) CH3CH2-O-CH2CH3 diethyl ether (ethoxyethane) Carbonyl Compounds Carbonyl compounds all contain a O This includes several types of compounds: Aldehydes Ketones Carboxylic acids Esters Amides ... 4-methyl-2-pentene Note that the double bond takes precedence in naming III Naming Aromatic Compounds Aromatic Compounds are cyclic hydrocarbons containing a benzene structure Benzene can be represented ... table Not all the alkanes are straight chained compounds, as shown in the previous table, they can have side chains or branches These variations of compounds which have the same number of carbon...
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Tài liệu METHOD 21 - DETERMINATION OF VOLATILE ORGANIC COMPOUND LEAKS doc
Ngày tải lên :
14/02/2014, 08:20
... G.E Harris Response Factors of VOC Analyzers at a Meter Reading of 10,000 ppmv for Selected Organic Compounds U.S Environmental Protection Agency, Research Triangle Park, NC Publication No EPA ... 1981 Brown, G.E., et al Response Factors of VOC Analyzers Calibrated with Methane for Selected Organic Compounds U.S Environmental Protection Agency, Research Triangle Park, NC Publication No EPA ... the following specifications is required: 6.1 The VOC instrument detector shall respond to the compounds being processed Detector types that may meet this requirement include, but are not limited...
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Volatile organic compound measurements at Trinidad Head, California, during ITCT 2K2: Analysis of sources, atmospheric composition, and aerosol residence times pot
Ngày tải lên :
05/03/2014, 20:20
... independent and D23S16 neither are the compounds chosen to represent each factor Loadings for these compounds on all factors are shown in Table While the five chosen compounds load on more than one ... variability in the organic aerosol, likely reflecting a common source, i.e., photochemical production of oxygenated VOCs and secondary organic aerosol The relationship between the organic aerosol ... Gschwend, P M., O C Zafiriou, R F C Mantoura, R P Schwarzenbach, and R B Gagosian (1982), Volatile organic compounds at a coastal site Seasonal variations, Environ Sci Technol., 16(1), 31 – 38 Hamrud,...
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Microorganisms Associated with Volatile Organic Compound Production in Spoilt Mango Fruits docx
Ngày tải lên :
05/03/2014, 20:20
... Extraction of volatile metabolites Volatile compounds were extracted using general purpose solvent Parliment (1997) as described by Ibrahim et al (2011) Extraction of volatile compounds was done ... above volatile organic compounds and the differences in their relative abundance could be considered for qualitative discrimination of healthy and spoilt mango fruits especially when unique compounds ... microorganisms associated with spoilt mango fruits in Sokoto metropolis; extract and identifying volatile organic compounds associated with spoilt sweet pepper using GC-MS Materials and Methods Sample...
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Chemical Composition of Vehicle-Related Volatile Organic Compound Emissions in Central California pdf
Ngày tải lên :
05/03/2014, 20:20
... mass-balance receptor modeling for volatile organic compounds Atmospheric Environment 28, 3261-3276 Lonneman, W.A.; Seila, R.L.; Meeks, S.A (1986) Non-methane organic composition in the Lincoln ... global climate (Seinfeld and Pandis, 1997; IPCC, 2001) The main anthropogenic sources of volatile organic compounds are motor vehicle-related, with significant additional emissions arising from ... help design air pollution control strategies Exposure to some organic compounds also may pose human health hazards, and consequently compounds such as benzene and 1,3-butadiene have been identified...
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Optimal Time for Collecting Volatile Organic Chemical Samples from Slowly Recovering Wells ppt
Ngày tải lên :
05/03/2014, 21:20
... characterization of water samples Volatile organic compounds Nonvolatile organic compounds RESULTS AND DISCUSSION Volatile Organic Compound Data Nonvolatile Organic Compound Data CONCLUSIONS ... Law constant for each of the volatile organiC compounds Henry's Law constants are highest for the most volatile compounds It was hypothesized that the most volatile compounds would be the most ... consistent with the findings of Friedman et al (1986) Nonvolatile organic compounds Figure outlines the method used for extracting nonvolatile organic compounds (baselneutral and acid extracts) An 800-mL...
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Volatile organic compound emission and other trace gases from selected animal buildings ppt
Ngày tải lên :
05/03/2014, 21:20
... Emission rates of odorous compounds from pig slurries J Sci Food Agric 77(3):341-348 Hobbs PJ, Webb J, Mottram TT, Grant B, Misselbrook TM (2004) Emissions of volatile organic compounds originating ... Delahunty C (2002) Analysis of volatile flavour compounds by proton transfer reaction-mass spectrometry : fragmentation patterns and discrimination between isobaric and isomeric compounds Int J Mass Spectrom ... Filipy J, Rumburg B, Mount G, Westberg H, Lamb B (2006) Identification and quantification of volatile organic compounds from a dairy Atmos Environ 40(8):1480-1494 Galbally IE, Kirstine W (2002) The...
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Atmospheric volatile organic compound measurements during the Pittsburgh Air Quality Study: Results, interpretation, and quantification of primary and secondary contributions pot
Ngày tải lên :
05/03/2014, 21:20
... volatile organic compounds at a rural site in the southeastern United States, J Geophys Res., 103(D21), 28,111 – 28,128 Schade, G W., and A H Goldstein (2001), Fluxes of oxygenated volatile organic ... C10 volatile organic compounds above a Sierra Nevada ponderosa pine plantation, J Geophys Res., 104(D17), 21,247 – 21,262 Lim, H J., and B J Turpin (2002), Origins of primary and secondary organic ... (2003), Effect of acidic seed on biogenic secondary organic aerosol growth, Atmos Environ., 37(30), 4287 – 4299 16 of 17 D07S07 MILLET ET AL.: VOLATILE ORGANICS AT THE PITTSBURGH SUPERSITE Fraser, M...
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Detection of Pseudomonas aeruginosa in sputum headspace through volatile organic compound analysis potx
Ngày tải lên :
05/03/2014, 21:20
... VOCs Breath or Table Literature overview of volatile organic compounds found in in vitro and in vivo studies in samples with Pseudomonas aeruginosa Volatiles reference acetaldehyde, acetic acid, ... and follow-up of bacterial infection are being investigated One approach is detection of volatile organic compounds (VOCs) produced by bacteria P aeruginosa may be detected by analyzing VOCs produced ... 2012, 13:87 http://respiratory-research.com/content/13/1/87 Page of Table Overview of all volatile organic compounds studied with their respective retention time (RT), Kovats retention index (RI)...
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