classifications of volatile organic compounds
INDOOR AIR QUALITY - SECTION 4 (end) pot
... body cavity, primarily the abdominal organs VOC Volatile organic compound(s) volatile Compounds with a boiling range of 0° to 290°C yeasts—Species of fungi that grow as single cells zeophylic—Dry-loving ... ideal conditions, detect as little as 10-20 grams of some elements, and 10-19 grams of most elements It is fully capable of analysis of trace amounts of material from samples as small as micron and, ... residences of asthma patients Identify areas or sources of elevated levels of allergen(s) Determine the effectiveness of allergenic-dust control measures ©2002 CRC Press LLC Most of the information...
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Tài liệu Glossary of Volatile Organic Compounds ppt
... Two natural sources of benzene are volcanoes and forest fires Benzene is a natural part of crude oil, gasoline, and cigarette smoke Benzene is one of the major components of JP-8 fuel Industry ... moderate levels of trichloroethylene can get enlarged livers, and high levels of exposure can cause liver and kidney damage Studies of people exposed over long periods to high levels of trichloroethylene ... oil, gas, and coal, and from discharges of ethylbenzene from factories Ethylbenzene gets into the soil by spills of gasoline or other fuels and poor disposal of industrial and household wastes People...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
... 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 = weight (gm) of the non-propellant ... DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS APPLICABILITY 1.1 This method (Method 310) applies to the determination of ... the total volatile material in a product and the presence of any compounds prohibited by ARB regulations (“prohibited compounds ) Components of the product that not meet the definition of a VOC...
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Source Identification of Volatile Organic Compounds in Houston, Texas pdf
... and si are the values of wind direction and wind speed of sample i The ranges of wind direction and wind speed are divided into a series of subranges having similar numbers of samples in each Then ... The principle of 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 ... overfitting of c13-benzene for the case of 10 sources Neither poor fit nor over fit is acceptable So the number of sources for this analysis was chosen to be During the experiments, FIGURE Profiles of...
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Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area potx
... 2370 E C Apel et al.: Chemical evolution of volatile organic compounds Fig 14 Results of a MM model run to test of the sensitivity of the model to specific compounds The model was initialized with ... evolution of volatile organic compounds Fig The top 20 compounds measured at T0 (top panel) and T1 (lower panel) in terms of mixing ratios between 09:00 and 18:00 local time averaged over the month of ... of volatile organic compounds Fig The top 20 compounds measured from T0 (top panel), T1 (middle panel) and the C130 platform (lower panel), in terms of OH reactivity averaged over the month of...
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Estimation of emissions of nonmethane organic compounds from a closed landfill site using a landfill gas emission model
... potential (m3/mg of waste), Mi = the mass of solid waste in the ith section of the landfill (mg), ti = the age of the ith section of the section of the landfill (years), t = the age of the landfill ... Journal of Energy and Environment (IJEE), Volume 4, Issue 1, 2013, pp.85-92 Figure Graph of frequency against range of values of age of landfill (t) Figure represents range of values of the total ... 0.0496, and 0.223 respectively Figure Graph of the frequency against the range of values of CNMOC Figure Graph of frequency against range of values of average annual acceptance rate ® ISSN 2076-2895...
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Tài liệu METHOD 21 - DETERMINATION OF VOLATILE ORGANIC COMPOUND LEAKS doc
... practices and determine the applicability of regulatory limitations prior to performing this test method 5.2 Hazardous Pollutants Several of the compounds, leaks of which may be determined by this method, ... [Reserved] References Dubose, D.A., and 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 ... concentration 3.2 Calibration precision means the degree of agreement between measurements of the same known value, expressed as the relative percentage of the average difference between the meter readings...
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Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells pdf
... Three-dimensional 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 ... 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 of concern because of very ... well samples PCE–TCA Chloroform–PCE Chloroform–MTBE PCE–TCE Dibromochloromethane– chloroform Chloroform–TCA TCA–TCE PCE–MTBE Bromoform– dibromochloromethane Bromoform–chloroform Public well samples...
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PROTOCOL FOR EQUIPMENT VERIFICATION TESTING OF VOLATILE ORGANIC CHEMICAL REMOVAL ppt
... Statement of typical rates of consumption of chemicals, a description of the physical and chemical nature of wastes, and rates of waste production; concentrates, residues, etc.; Definition of the ... Testing Plan for Removal of Volatile Organic Chemicals by Air Stripping Technology 2-1 Chapter 3: EPA/NSF ETV Equipment Verification Testing Plan for Removal of Volatile Organic Chemicals by ... by a statistical analysis of the data An example of a satisfactory statement of performance objectives would be: “This system is capable of reducing the concentration of 1,1,2-trichloroethylene...
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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 ... investigation was funded as a project of EPA'sControl Technology Center (CTC) The CTC was established by EPA's Office of Research and Development (ORD) and Office of Air Quality Planning and Standards ... repainting of a small portion of the vehicle (a panel, or a "spot" on a panel) A minority of jobs involve the overall repainting of vehicles, which is generally performed in instances of coating...
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Total Volatile Organic Compounds (WOC) in Indoor Air Quality Investigations doc
... Classzjication of indoor organic pollutants (WHO, 1989) Category Description Abbreviation Very volatile (gaseous) organic compounds VVOC Volatile organic compounds VOC organic compounds associated ... list of such compounds should be established TVOC, or other measures of volatile organic compounds, may be used for a number of other applications Examples are: Testing of materials, indication of ... usage of indicators for assessing the effects of volatile organic compounds (VOCs) in indoor air on comfort and health is reviewed Advantages and disadvantages of a TVOC (Iota1 Volatile Organic Compounds) ...
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Báo cáo sinh học: "A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds" pot
... observed shift of wavelength and the corresponding change of EOT signal are attributed to a change of the porous refractive index of nanoporous AAO layer as a result of the adsorption of H2S molecules ... the use of nanoporous anodic aluminium oxide [AAO] for reflective interferometric sensing of volatile sulphur compounds and hydrogen sulphide [H2S] gas Detection is based on changes of the interference ... concentration of total sulphur compounds in the malodour of healthy individuals is between 0.2 to 0.4 µg/L [24] Detection of VSCs within these limits by the Au-AAO sensor confirms the high sensitivity of...
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báo cáo hóa học:" A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds" pdf
... observed shift of wavelength and the corresponding change of EOT signal are attributed to a change of the porous refractive index of nanoporous AAO layer as a result of the adsorption of H2S molecules ... the use of nanoporous anodic aluminium oxide [AAO] for reflective interferometric sensing of volatile sulphur compounds and hydrogen sulphide [H2S] gas Detection is based on changes of the interference ... concentration of total sulphur compounds in the malodour of healthy individuals is between 0.2 to 0.4 µg/L [24] Detection of VSCs within these limits by the Au-AAO sensor confirms the high sensitivity of...
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Báo cáo hóa học: " A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds" docx
... observed shift of wavelength and the corresponding change of EOT signal are attributed to a change of the porous refractive index of nanoporous AAO layer as a result of the adsorption of H2S molecules ... http://www.nanoscalereslett.com/content/6/1/634 Page of Figure Schematic of the RIfS device for gas sensing Scheme of detection of VSCs using nanoporous Au-AAO reusable halves and sealed during use by fixing in a bondless microfluidic ... concentration of total sulphur compounds in the malodour of healthy individuals is between 0.2 to 0.4 µg/L [24] Detection of VSCs within these limits by the Au-AAO sensor confirms the high sensitivity of...
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Báo cáo hóa học: " Effects of rehydration nutrients on H2S metabolism and formation of volatile sulfur compounds by the wine yeast VL3" docx
... Francis I, Henschke PA (2011) Comparison of inorganic and organic nitrogen supplementation of grape juice - Effect on volatile composition and aroma profile of a Chardonnay wine fermented with Saccharomyces ... while the concentration of higher alcohols was decreased (Additional file 1) Further characterisation of the effect of rehydration nutrients on the formation of volatile sulfur compounds was obtained ... induced the formation of H2S while the addition of DAP delayed it Page of 11 (Figure 1c) Nonetheless, these results support our previous hypothesis of distinct effects for each of the treatments...
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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
... 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 ... patients who underwent tumor resection because of histological evidence of NSCLC at the University of Parma's Department of Thoracic Surgery The assessments of tumour size and nodes were based on the ... COPD, all of whom were diagnosed on the basis of the GOLD guidelines [13] In brief, the entry criteria, consisted of a post-bronchodilator FEV1 of
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Occurrence and fate of semivolatile organic compounds (SVOCs) in the tropical atmosphere
... Comparison of Adsorption and KOA Absorption Models 115 6.3.4 Influence of Soot Carbon 122 6.4 Conclusion 125 Chapter Precipitation Scavenging of Semi -volatile Organic Compounds ... aqueous free energy of solvation of compounds Gravitational settling velocity Standard deviation of wind speed Kinematic viscosity Kinematic viscosity of solution xv List of Abbreviations ACE ... Among the organic chemicals in the atmospheric environment, semivolatile organic compounds (SVOCs) have received considerable attention because of their physic-chemical properties SVOCs are compounds...
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Tài liệu ADSORPTION OF ORGANIC COMPOUNDS doc
... ADSORPTION OF ORGANIC COMPOUNDS 13.17 FIGURE 13.12 Effect of biodegradation and the presence of nonadsorbable compounds on the shapes of breakthrough curves steam and CO2 at temperatures of 800 to ... presence of nonadsorbable compounds, the biodegradation of compounds in a biologically active column, slow adsorption of a fraction of the molecules present, and the critical depth of the column ... the intensity and frequency of appearance of taste and odor compounds, the presence of organics that compete for adsorption sites, and the concentration of these compounds that is acceptable...
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- detection frequencies and median concentrations for selected volatile organic compounds
- concentrations of selected volatile organic compounds vocs in samples of untreated gro
- summary of concentrations of selected volatile organic compounds in domestic well sample
- summary of concentrations of selected volatile organic compounds in public wells in com
- the speciation of hydrophobic organic compounds by dissolved organic matter
- uk categorisation of volatile organic compounds
- mold volatile organic compounds and mold detection
- classification volatile organic compounds
- volatile organic compounds in the atmosphere
- physical chemical and environmental properties and safety aspects of halogenated volatile organic compounds vocs
- synthesis of heat induced separation network for condensation of volatile organic compounds
- detection and identification of gases and volatile organic compounds
- variation sources and emission rates of volatile organic compounds over the northeastern u s
- uptake of volatile organic compounds
- activity mechanism and effect of water as a promoter of uranium oxide catalysts for destruction of volatile organic compounds
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