mold volatile organic compounds and mold detection
Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells pdf
... that is clean and safe for drinking and recreation and that is suitable for industry, irrigation, and habitat for fish and wildlife Escalating population growth and increasing demands for the ... : 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 ... of volatile organic compounds in aquifers.2 applied in management and policy decisions We hope this NAWQA publication will provide you the needed insights and information to meet your needs, and...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
... commencing with 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 ... METHOD 310 DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS APPLICABILITY 1.1 This ... 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 =...
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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
... inflammatory and oxidative lung processes, and different volatile organic compounds (VOCs) of endogenous or exogenous origin have been analyzed to study lung diseases [1] and characterize environmental and ... defined standard operating procedures, and validated analytical methods of VOC collection and analysis The factors affect the SPME process, such as adsorption and desorption times and sampling ... comparing its retention time with that of pure standard and charac- The method was validated by studying the linear range, and the limits of detection and precision Linearity was established over...
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Tài liệu Glossary of Volatile Organic Compounds ppt
... control moths, molds, and mildew and to deodorize restrooms and waste containers It does not occur naturally but is produced by chemical companies to make products for home use and other chemicals ... during forest fires Xylene is used as a solvent and in the printing, rubber, and leather industries It is used as a cleaning agent and a thinner for paint and varnishes Xylene is a major component ... adhesives, and rubber, and in some printing and leather tanning processes Toluene is a major component of JP-8 fuel Toluene enters the air through automobile exhaust It can enter surface water and groundwater...
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Source Identification of Volatile Organic Compounds in Houston, Texas pdf
... Generate a random series r with the same length as c (7292 elements) and variance νr2 ) (b) Perform FFT on c and r, and calculate their magnitude spectra and call them mfc and mfr (c) Plot mfc and mfr, ... contribution from the northwest and a spike in the south The motor vehicles on highways 225 and 146 and Spencer Hwy may increase the concentrations of c9- and c10-benzenes and may be a reason for the ... ∑∑ i)1 j)1 I (eij/σij)2 + J ∑ ∑(e′ /σ′ ) ij ij (4) i)1 j)1 in which eij and e′ are determined by eqs 3a and 3b and σij ij and σ′ are the error estimates, which can be considered as ij special weights...
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Total Volatile Organic Compounds (WOC) in Indoor Air Quality Investigations doc
... 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 new and reccntly ... Classzjication of indoor organic pollutants (WHO, 1989) Category Description Abbreviation Very volatile (gaseous) organic compounds VVOC Volatile organic compounds VOC organic compounds associated ... of volatile organic compounds in indoor air - A review Indoor Air, 4, 123-134 Cometto-Muniz, J.E., Cain, W.S., 1995 Mixtures of volatile organic compounds: Detection of odour, nasal pungency, and...
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Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area potx
... focus specifically on the characterization of volatile organic compounds (VOCs) in the MCMA, both on the ground and aloft and on the emission, transport, and transformation of VOCs downwind of the ... of volatile organic compounds following compounds were utilized in this paper: methanol, acetaldehyde, acetone, and methyl ethyl ketone (MEK) An on-line gas chromatograph with flame ionization detection ... 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 ratios between 09:00 and 18:00 local time averaged...
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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
... communication), and was analyzed daily to check for blank problems and contamination for all measured compounds Precision, accuracy and detection limits for measured compounds, along with the 0.25, 0.50 and ... 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 and VOCs ... relationship with gas-phase volatile organic carbon and assessment of instrument performance, J Geophys Res., 109, D23S24, doi:10.1029/2003JD004208, in press Andreae, M O., and P J Crutzen (1997),...
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Volatile organic compound emission and other trace gases from selected animal buildings ppt
... identified and measured the mixing ratios of major volatile organic compounds emitted by pigs and sheep in Germany The diurnal variations of carbon dioxide, nitrous oxide, methane, and ammonia ... Quellgruppe Landwirtschaft Braunschweig : FAL, 279 p, Landbauforsch Völkenrode SH 260 Filipy J, Rumburg B, Mount G, Westberg H, Lamb B (2006) Identification and quantification of volatile organic compounds ... Emissions of volatile organic compounds originating from UK livestock agriculture J Sci Food Agric 84(11):1414-1420 Jeppsson KH (2000) SE-structure and environment : carbon dioxide emission and water...
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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
... 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 ... Schlapfer, and S Wunderli (1998), Emission factors from road traffic from a tunnel study (Gubrist tunnel, Switzerland) part III: Results of organic compounds, SO2 and speciation of organic exhaust ... available trace gas and high temporal resolution aerosol data Compounds are grouped into factors according to their covariance, and the strength of association between compounds and factors is expressed...
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Detection of Pseudomonas aeruginosa in sputum headspace through volatile organic compound analysis potx
... Therefore, other techniques aiming at diagnosis and follow-up of bacterial infection are being investigated One approach is detection of volatile organic compounds (VOCs) produced by bacteria P aeruginosa ... 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, ... for the sulphur compounds dimethyl disulfide (VID = −0.46), dimethyl trisulfide (VID = −0.47) and dimethyl tetrasulfide (VID = −0.43) and two other compounds: hexane (VID = −0.38) and 2-methyl pentane...
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Analysis of the atmospheric distribution, sources, and sinks of oxygenated volatile organic chemicals based on measurements over the Pacific during TRACE-P pdf
... C J Popp, and R S Martin (2004), Biogenic emissions and ambient concentratiosn of hydrocarbons, carbonyl compounds and organic acids from Pondorosa pine and Cottonwood trees of rural and forested ... concentrations and large emission rates have been measured in many forested ecosystems and grass land areas [Kimmerer and MacDonald, 1987; Kelsey, 1996; Lamanna and Goldstein, 1999; Schade and Goldstein, ... and R C MacDonald (1987), Acetaldehyde and ethanol biosynthesis in plants, Plant Physiol., 84, 1204 – 1209 Kirstine, W., I Galbally, Y Ye, and M Hooper (1998), Emissions of volatile organic compounds...
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USEPA REGION 9 TECHNICAL GUIDELINES FOR ACCURATELY DETERMINING VOLATILE ORGANIC COMPOUND (VOC) CONCENTRATIONS IN SOIL AND SOLID MATRICES potx
... Method 5035, “Closed-System Purgeand-Trap and Extraction for Volatile Organics in Soil and Waste Samples,” and Method 5021, Volatile Organic Compounds in Soils and Other Solid Matrices Using Equilibrium ... Volatile Organic Compound Concentration in Soil and Solid Matrices 8.0 REFERENCES American Society for Testing and Materials (2003) Standard Guide for Sampling Waste and Soils for Volatile Organic Compounds, ... or sampling and analysis plan (SAP) 2.0 PURPOSE EPA Region has developed technical guidelines to help ensure that sampling and analyzing for Volatile Organic Compounds (VOCs) in soil and solid...
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ALDEHYDE AND OTHER VOLATILE ORGANIC CHEMICAL EMISSIONS IN FOUR FEMA TEMPORARY HOUSING UNITS – FINAL REPORT pdf
... individual and total volatile organic compounds in residential indoor air of Schleswig-Holstein, Germany” J Environ Monit Vol 6, 745-752 Hodgson, A.T (1999) Common Indoor Sources of Volatile Organic Compounds: ... (2000) "Volatile Organic Compound Concentrations and Emission Rates in New Manufactured and Site-Built Houses", Indoor Air, 10, 178-192 Hodgson, A.T and H Levin (2003) Volatile Organic Compounds in ... units (THUs) for a range of volatile organic compounds (VOCs) and aldehydes including formaldehyde, and 2) determine materials specific emission factors of these compounds from individual surface...
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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf
... solutions 3.12 Calibration Standard (CAL) A solution prepared from the primary dilution standard solution or stock standard solutions and the internal standards and surrogate analytes The CAL ... mammalian carcinogens Pure standard materials and stock standard solutions of these compounds should be handled with suitable protection to skin, eyes, etc EQUIPMENT AND SUPPLIES (All specifications ... rules and land disposal restrictions The laboratory using this method has the respons-ibility to protect the air, water, and land by minimizing and controlling all releases from fume hoods and...
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Volatile Organic Compound Concentrations and Emission Rates Measured over One Year in a New Manufactured House pptx
... Indoor exposures to toxic and irritating volatile organic compounds (VOCs) are of general concern Residences are particularly important exposure environments for these compounds because people ... direct and immediate effects The influence of indoor temperature and relative humidity on the emissions and concentrations of formaldehyde has been studied and modeled in chamber experiments and ... less volatile VOCs would be expected to have lower emission factors at low air change rates due to sorption and re-emission effects However, some of the more volatile compounds (e.g., pentanal and...
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PREDICTION OF CHEMICAL REACTIVITY PARAMETERS AND PHYSICAL PROPERTIES OF ORGANIC COMPOUNDS FROM MOLECULAR STRUCTURE USING SPARC pptx
... boundaries to cover a broad range of organic compounds SPARC presently predicts numerous physical properties and chemical reactivity parameters for a large number of organic compounds strictly from molecular ... the electrostatic interaction between S and C depends on the magnitude and relative orientation of the local fields of S and C and the dielectric properties and distances through the conducting ... + [ B c + δ H (∆pK a)c ]/ T where Ac and Bc are the entropic and the enthalpic van't Hoff coefficients for the reaction center, and δH and δs are enthalpic and entropic perturbations, respectively...
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Volatile Organic Compound Detection Using Nanostructured Copolymers potx
... between the polymers and analytes are most likely at play simultaneously, and further experiments are underway to better identify and understand those mechanisms Hopefully this work and future studies ... exposure of PHT-b-PS and PHT-b-PMA by toluene and benzene caused a strong increase in conductivity In these cases, toluene and benzene may interact more strongly with the PS and PMA block than ... F49620-02-1-0359-P00001, and the National Institute for Occupational Safety and Health Centers for Disease Control and Prevention, Award No 2002002-00528, for their financial support of this program (The findings and...
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heats of hydrogenation experimental and computational hydrogen thermochemistry of organic compounds
... Experimental and Computational Hydrogen Thermochemistry of Organic Compounds Experimental and Computational Hydrogen Thermochemistry of Organic Compounds Long Island University, USA l ... Heats of Hydrogenation Practical and historical aspects of experimental determination of the enthalpies of hydrogenation and formation \ydH29S and Af H29i of organic compounds, primarily hydrocarbons, ... mechanical effects and molecular strain, for example, resonance stabilization of aromatic compounds, conjugative stabilization of linear polyenes and polyynes, and steric effects in cisand trans- isomers...
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- classes of organic compounds and functional groups
- classes of organic compounds and their functional groups
- classes of organic compounds and functional groups ppt
- 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
- physical chemical and environmental properties and safety aspects of halogenated volatile organic compounds vocs
- detection and identification of gases and volatile organic compounds
- variation sources and emission rates of volatile organic compounds over the northeastern u s
- volatile organic compounds sources sampling and analysis
- o3 and volatile organic compounds vocs
- mold volatile organic compounds amp mold detection
- activity mechanism and effect of water as a promoter of uranium oxide catalysts for destruction of volatile organic compounds
- volatile and semi volatile organic compounds in beehive atmospheres
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