manufactured house air change rate weather volatile organic compound voc formaldehyde emission rate indoor air quality
Volatile Organic Compound Concentrations and Emission Rates Measured over One Year in a New Manufactured House pptx
... Manufactured house, air change rate, weather, volatile organic compound (VOC) , formaldehyde, emission rate, indoor air quality Introduction Indoor exposures to toxic and irritating volatile organic compounds ... the emission factor at the lower air change rate to the emission factor at the higher air change rate was near unity for the most volatile compounds and generally decreased with decreasing compound ... the house (m3); a is the air change rate (h-1); C is the air concentration of the compound in the house (µg m-3); and C0 is the outdoor air concentration (µg m-3) Area-specific emission rates...
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Volatile Organic Compound (VOC) - Vluchtige Organische Stoffen (VOS) potx
... definition relates to Indoor Air Quality World Health Organisation (1989) “any organic compounds” - very volatile organic compound (VVOC) < up to 50 - volatile organic compound (VOC) 50 - 100 up to ... “any organic compounds” - volatile organic compound (VOC) GC rt C6 - C16 (b.p 287 °C) - semivolatile organic compound (SVOC) GC rt > C16 - C22 (b.p 368 °C) - This definition relates to Indoor Air ... Very Volatile Organic Compounds - VVOC Organic compounds that are detected before n-hexane (< n-C6) under the conditions specified in ISO 16 000 part Semi -Volatile Organic Compounds - SVOC Organic...
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Volatile Organic Compound (VOC) measurements in the Pearl River Delta (PRD) region, China pdf
... of volatile organic compounds, Chem Rev., 103(12), 4605–4638, 2003 Barletta, B., Meinardi, S., Rowland, F S., Chan, C Y., Wang, X M., Zou, S C., Chan, L Y., and Blake, D R.: Volatile organic compounds ... ambient volatile organic compounds in Beijing city, China, J Environ Sci Heal A, 40(10), 1843–1860, 2005 Na, K., Kim, Y P., and Moon, K C.: Diurnal characteristics of volatile organic compounds ... made the largest contribution to the OH loss rate Using correlations among VOC compounds, we evaluated the relative importance of local emissions of VOCs at different sites We attributed the ambient...
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USEPA REGION 9 TECHNICAL GUIDELINES FOR ACCURATELY DETERMINING VOLATILE ORGANIC COMPOUND (VOC) CONCENTRATIONS IN SOIL AND SOLID MATRICES potx
... holding time.” Additionally, the quality control criteria and quality December 2005 -8- EPA Region Technical Guidelines for Accurately Determining Volatile Organic Compound Concentration in Soil ... Four Volatile Organic Compounds in Soil Subsamples US Army Cold Regions Research and Engineering Laboratory, Special Report 94-6 Hewitt, A.D (1995) Chemical Preservation of Volatile Organic Compounds ... Analysis of Volatile Organic Compounds US Army Cold Regions Research and Engineering Laboratory, Special Report 96-5 Hewitt, A.D (1997) Preparing Soil Samples for Volatile Organic Compound Analysis,...
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Volatile Organic Compound (VOC) Concentration Limits for Automotive Refinishing Products Regulations doc
... Regulations SECTION 1: INTERPRETATION Question 1.1: Definition of VOCs Q: What are VOCs? A: Volatile organic compounds (VOCs) are air pollutants that contribute to the formation of ground-level ... of smog, an ambient air quality issue with harmful impacts on both human health and the environment Concerning indoor air quality issues, these are not only related to VOC emissions since several ... This definition provides the list of excluded compounds The definition for the term “excluded compounds” set out in the Volatile Organic Compound (VOC) Concentration Limits for Automotive Refinishing...
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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
... with combustion and photochemical marker compounds Experimental 2.1 Pittsburgh Air Quality Study (PAQS) [6] The field component of the Pittsburgh Air Quality Study was carried out from July 2001 ... creating VOC free air in a matrix resembling real air as closely as possible Zero air was analyzed daily to check for blank problems and contamination for all measured compounds [14] Compounds measured ... sources to OVOC and OC levels is explored in detail in the following section 3.3 Source Apportionment of OVOCs and Aerosol Organic Carbon 3.3.1 OVOC Source Apportionment [37] Oxygenated VOCs can...
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Tài liệu Human-induced changes in US biogenic volatile organic compound emissions: evidence from long-term forest inventory data ppt
... heatwave emission 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 ... where changes in AVOC emissions were greater than changes in BVOC (e.g around New York City) The estimated difference between BVOC and AVOC emissions, and hence any estimate of changes in emissions, ... that US BVOC emissions are static on the decadal timescales relevant to air pollution policy Research into trends in BVOC emissions has concentrated on climate change, which can affect BVOC emissions...
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Tài liệu METHOD 21 - DETERMINATION OF VOLATILE ORGANIC COMPOUND LEAKS doc
... 1152 used as a direct measure of mass emission rate from individual sources 3.0 Definitions 3.1 Calibration gas means the VOC compound used to adjust the instrument meter reading ... the local VOC concentration at the surface of a leak source that indicates that a VOC emission (leak) is present The leak definition is an instrument meter reading based on a reference compound ... specified leak definition concentration that indicates that a VOC emission (leak) is not present 1153 3.5 Reference compound means the VOC species selected as the instrument calibration basis for...
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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
... boundary conditions for North American air quality OVOCs were the dominant compound class contributing to the total measured gas-phase VOC burden and the VOC OH reactivity at Trinidad Head Their ... measurements of C2 – C10 volatile organic compounds above a Sierra Nevada ponderosa pine plantation, J Geophys Res., 104(D17), 21,247 – 21,262 Liss, P S., and J N Galloway (1993), Air- sea exchange of sulphur ... air at Trinidad Head One simple index of the chemical reactivity of an air mass is the total OH reactivity for measured compounds, defined as OH Reactivity ¼ X kX ½X; ð3Þ X where kX is the rate...
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Microorganisms Associated with Volatile Organic Compound Production in Spoilt Mango Fruits docx
... 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
... Technical Services Division of the Bay Area Air Quality Management District 2 Abstract Trends in the composition and reactivity of volatile organic compound (VOC) emissions from motor vehicles are described ... formation VOC emission speciation is therefore an important input to sourceoriented photochemical models that are used to help design air pollution control strategies Exposure to some organic compounds ... Natural VOC emissions from plants are also important Knowledge of the detailed chemical composition of VOC emissions from major source categories is important because each individual VOC contributes...
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Volatile organic compound emission and other trace gases from selected animal buildings ppt
... mass release rates to get estimates of nationwide VOC fluxes The emission ratio EV (here for methane) is given by equation 1: EV (VOC) shed (CH ) shed (VOC) shed (VOC) Out g/mol C in VOC * 6 g/mol ... depends on how precisely the trace gas concentrations and the air exchange rates can be measured It is difficult to calculate the air exchange rate in naturally ventilated buildings This has commonly ... shed air turnover rates and constant background trace gas emission rates This was done using equation with the assumptions (i) of observing well-mixed air, (ii) that dilution with reference air...
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Detection of Pseudomonas aeruginosa in sputum headspace through volatile organic compound analysis potx
... being investigated One approach is detection of volatile organic compounds (VOCs) produced by bacteria P aeruginosa may be detected by analyzing VOCs produced in vitro (Table 1), although the ... measured a variable range of 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, ... −0.04 3-octanone 9,737 983,4667 −0.08 methyl isobutyl ketone 4,806 727,7824 −0.08 Volatile Organic Compounds (VOCs) were ranked according their VID with high values indicating a positive correlation...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
... equation: % VOC WL Vn WL WP EP WP 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 ... 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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Optical Fiber Sensors to Detect Volatile Organic Compound in Sick Build- ing Syndrome Applications potx
... a review and summary of the literature”, Indoor Air, vol 3(4), pp 227-236, 1993 H L M Hodgson, and P Wolkoff, Volatile organic compounds and indoor air , Journal of Allergy & Clinical Immunology, ... "Occupational Safety, and Health Administration Indoor air quality, 29 CFR”, Fed Register, 1994, pp 15968-6039 T Husman, “Health effects of indoor -air microorganisms”, Scandinavian Journal of Work, ... Laguna, Volatile alcoholic compounds fibre optic nanosensor”, Sensors and Actuators B, vol 115, pp 444-449, 2006 S Casado-Terrones, C Elosua, C Bariain, and A S Carretero, Volatile- organic- compound...
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Reduction of Volatile Organic Compound Emissions from Automobile Refinishing docx
... EPA-450/3-88-009 REDUCTION OF VOLATILE ORGANIC COMPOUND EMISSIONS FROM AUTOMOBILE REFINISHING CONTROL TECHNOLOGY CENTER SPONSORED BY: Emission Standards Division Off ice of Air Quality Planning and Standards ... available alternative technologies for reducing VOC emissions from automobile refinishing operations; 2) determine VOC emissions and achievable VOC emission reductions; and 3) evaluate the cost ... volatile organic compounds (VOC' s) must be reduced to a level consistent with attaining the ozone NAAQS as demonstrated by atmospheric dispersion modeling Once the State has determined the VOC emission...
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National Volatile Organic Compound Emission Standards for Architectural Coatings -- Background for Promulgated Standards docx
... the volatile organic compound (VOC) content limit for stains rather than lacquers Also, a definition for stains, including lacquer stains, has been added The term “community-based paint exchange” ... Agency Office of Air and Radiation Office of Air Quality Planning and Standards Research Triangle Park, North Carolina 27711 August 1998 Disclaimer This report has been reviewed by the Emission Standards ... EPA-453/R-98-006b National Volatile Organic Compound Emission Standards for Architectural Coatings Background for Promulgated Standards...
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National Volatile Organic Compound Emission Standards For Consumer Products -- Background for Promulgated Standards potx
... reduction in volatile organic compounds (VOC) emissions from consumer products One commenter (IV-F-1(b)) approved of the proposed rule because it allows significant reduction in VOC content and emissions ... NATIONAL VOLATILE ORGANIC COMPOUND EMISSION STANDARDS FOR CONSUMER PRODUCTS BACKGROUND FOR PROMULGATED STANDARDS Emission Standards Division U.S Environmental Protection Agency Office of Air and ... of Air Quality Planning and Standards Research Triangle Park, North Carolina 27711 August 1998 DISCLAIMER This report has been reviewed by the Emission Standards Division of the Office of Air Quality...
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Volatile Organic Compound Emissions from Automobile Refinishing -- Background Information for Promulgated Standards pot
... EPA-453/R-96-011b Volatile Organic Compound Emissions from Automobile Refinishing -Background Information for Promulgated Standards Emission Standards Division U.S ENVIRONMENTAL PROTECTION AGENCY Office of Air ... consumed In general, the benefits of VOC reductions in ozone attainment areas include reductions in emissions of VOC air toxics, reductions in the contribution from VOC emissions to the formation of ... of VOC emissions from consumer and commercial products The study showed that emissions from consumer and commercial products in 1990 were large an estimated 28 percent of total manmade VOC emissions...
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