mold volatile organic compounds amp mold detection

... taking air samples Air samples would represent dust components and levels that the occupant was breathing during the sampling period Methods herein are provided for settled surface dust sampling, ... dust sampling, airborne dust sampling, bulk sampling, and textile/carpet sampling Choose the method which is most appropriate to a given situation Settled Surface Dust Sampling Settled dust may be ... connection Another uses a molded plastic wand that contains a filter Air sampling pump with a polycarbonate membrane filter cassette2Samples are drawn through the filter with an air sampling pump in much...

Ngày tải lên: 11/08/2014, 07:20

... mainly through breathing air that contains it, for example while showering or bathing The level of exposure to benzene through food (for example, cooking with contaminated water), beverages, or ... cancer Measuring exposure Almost all of the Churchill County blood samples tested for trichloroethylene fell below the level of detection (0.01 ppb) The effect of trichloroethylene exposure on the ... known Return to menu 1,4-Dichlorobenzene 1,4-dichlorobenzene is a chemical used to control moths, molds, and mildew and to deodorize restrooms and waste containers It does not occur naturally but...

Ngày tải lên: 14/02/2014, 03:20

... 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...

Ngày tải lên: 14/03/2014, 20:20

... sampling period for the data in this study was from 08/20/00 to 09/08/00, and the most sampling frequencies were about 1/4-6 min-1, but the frequencies for some periods were min-1 All the samples ... detection limits values in the concentration measurements and meteorological data, 7292 samples were retained for analysis following the pretreatment below Consecutive missing values (for example, ... situated next to a 10-m sampling tower at the southwest side of the municipal airport at La Porte, TX, to identify and quantify the VOC mixture in that area A map showing the sampling site is presented...

Ngày tải lên: 22/03/2014, 14:20

... 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 ... 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 ... range of volatile organic compounds in whole air samples collected during PEM-Tropics A and B, Anal Chem., 73, 3723– 3731, 2001 Crounse, J D., DeCarlo, P F., Blake, D R., Emmons, L K., Campos,...

Ngày tải lên: 28/03/2014, 20:20

... 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...

Ngày tải lên: 05/09/2013, 16:11

... electrically driven pump to ensure that a sample is provided to the detector at a constant flow rate The nominal sample flow rate, as measured at the sample probe tip, shall be 0.10 to 3.0 l/min ... equipped with a probe or probe extension for sampling not to exceed 6.4 mm (1/4 in) in outside diameter, with a single end opening for admission of sample 6.6 The instrument shall be intrinsically ... been published for the compounds of interest for the instrument or detector type, the response factor determination is not required, and existing results may be referenced Examples of published...

Ngày tải lên: 14/02/2014, 08:20

... Total concentrations for each VOC group were summed for each sample with detections For domestic well samples, organic synthesis compounds had the greatest median total concentration (1.1 µg/L), ... : 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 ... (HBSL) for compounds without an MCL) Eight compounds were detected at concentrations of potential concern, and three of these compounds occurred in both domestic and public well samples Most...

Ngày tải lên: 14/03/2014, 19:20

... executing consistent sample collection procedures, including sample locations, timing of sample collection, sampling procedures, sample preservation, sample packaging, and sample shipping Representativeness ... collection procedures, including sample locations, timing of sample collection, sampling procedures, sample preservation, sample packaging, and sample shipping to maintain a high level of accuracy in ... Verification Testing for Volatile Organic Chemical Removal: Requirements for All Studies 1-1 Chapter 2: EPA/NSF ETV Equipment Verification Testing Plan for Removal of Volatile Organic Chemicals...

Ngày tải lên: 14/03/2014, 19:20

... policy published in the Federal Registure on November 24, 1987 (52 FR 45044), emissions of volatile organic compounds (VOC's) must be reduced to a level consistent with attaining the ozone NAAQS ... Protection Agency Cincinnati, OH 45268 October 1988 EPA-450/3-88-009 October 1988 REDUCTION OF VOLATILE ORGANIC COMPOUND EMISSIONS FROM AUTOMOBILE REFINISHING Prepared by: Carol Athey Charles Hester ... EPA-450/3-88-009 REDUCTION OF VOLATILE ORGANIC COMPOUND EMISSIONS FROM AUTOMOBILE REFINISHING CONTROL TECHNOLOGY CENTER SPONSORED...

Ngày tải lên: 22/03/2014, 14:20

... 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 ... 1994 Concentrations 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,...

Ngày tải lên: 28/03/2014, 19:20

... A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds Tushar Kumeria1, Luke Parkinson1 and Dusan Losic*1 Ian Wark Research Institute, ... 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 signal from AAO ... example of biomedical determination of H2S that can be used for diagnosis of specific diseases [5] Oral malodour, also known as halitosis or bad breath, is largely caused by volatile sulphur compounds...

Ngày tải lên: 18/06/2014, 22:20

... A nanoporous interferometric micro-sensor for biomedical detection of volatile sulphur compounds Tushar Kumeria1, Luke Parkinson1 and Dusan Losic*1 Ian Wark Research Institute, ... 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 signal from AAO ... example of biomedical determination of H2S that can be used for diagnosis of specific diseases [5] Oral malodour, also known as halitosis or bad breath, is largely caused by volatile sulphur compounds...

Ngày tải lên: 20/06/2014, 04:20

... [17-19] RIfS sensing using AAO was demonstrated for sensitive organic and biomolecular detection in aqueous solution, but the application for detection of gas molecules has not yet been considered In ... article as: Kumeria et al.: A nanoporous interferometric microsensor for biomedical detection of volatile sulphur compounds Nanoscale Research Letters 2011 6:634 Submit your manuscript to a journal ... sensitivity and selectivity for H2S and VSC detection, the AAO surface was coated with gold which is Page of known to have a good affinity with SH groups [22] The gas detection is based on the changing...

Ngày tải lên: 20/06/2014, 23:20

... formed in fermentation and a sampling port Samples were collected through the sampling port using a sterile syringe Fermentation volume was either L (for comprehensive volatile analysis) or L Fermentation ... have an effect on the wine volatile composition (data not shown) Sulfur compounds exert a strong influence on wine aroma, due to their low detection threshold These compounds can be classified ... Pollnitz AP, Jeffery DW (2010) Selective determination of volatile sulfur compounds in wine by gas chromatography with sulfur chemiluminescence detection J Agric Food Chem 58:9454–9462 doi:10.1021/jf102008r...

Ngày tải lên: 20/06/2014, 23:20

... 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 ... with co-eluting compounds were chosen Breath collection After carrying out a series of experiments in order to establish a reliable sampling procedure, we modified the breath sampling procedure ... 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...

Ngày tải lên: 12/08/2014, 18:21

Ngày tải lên: 12/04/2015, 14:24

... of Sampling Sites 37 3.2 Sampling Instrumentation 39 3.2.1 High Volume PUF Air Sampler 39 3.2.2 Automated Wet-Dry Sampler 40 3.2.3 Sea Surface Water Sampler ... 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 ... Semi -volatile Organic Compounds (SVOCs) In A Tropical Area 127 7.1 Introduction 127 7.2 Theoretical Basis 129 7.3 Experimental 132 7.3.1 Sampling...

Ngày tải lên: 11/09/2015, 10:15

... representative sample By using equipment such as a sample reducer and a sample splitter, representative samples from large quantities (bags) of GAC can be obtained The sample reducer reduces sample sizes ... 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...

Ngày tải lên: 14/02/2014, 03:20