volatile organic chemical voc poisoning

... Procedures Chemical Analysis Chemical characterization of water samples Volatile organic compounds Nonvolatile organic compounds RESULTS AND DISCUSSION Volatile Organic Compound Data Nonvolatile Organic ... before samples are colJected for volatile organic chemical analysis In a related experiment, 27 pairs of samples were colJected for nonvolatile (extractable) organic chemical analysis before purging ... 601, 602, 624, and 625 (U.S EPA 1982) were used in the chemical characterization of volatile and nonvolatile organic priority pollutants Other chemical analyses, such as for pH, specific conductivity,...

Ngày tải lên: 05/03/2014, 21:20

... 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 by ... Removal of Volatile Organic Chemicals by Adsorptive Media Processes 3-1 January 2004 Page vi CHAPTER EPA/NSF ETV PROTOCOL FOR EQUIPMENT VERIFICATION TESTING FOR VOLATILE ORGANIC CHEMICAL ... protocol to be used for verification testing of equipment designed to achieve removal of volatile organic chemicals (VOCs) The equipment Field Testing Organization (FTO) is requested to adhere to the...

Ngày tải lên: 14/03/2014, 19:20

... very volatile organic compound (VVOC) < up to 50 - volatile organic compound (VOC) 50 - 100 up to 240 - 260 °C - semivolatile organic compound (SVOC) 240 - 260 up to 380 - 400 °C - particulated organic ... assessment of building products) “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 ozone formation US EPA Definition of VOC - Volatile Organic Compounds Volatile Organic Compound (VOC) ” means any compound containing at least one atom of carbon,...

Ngày tải lên: 14/03/2014, 20:20

... following 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 ... Method 310 for determining VOC content was evaluated using seven representative products with known volatile organic compound (VOC) contents ranging from 6.2 to 81.2 percent VOC by weight Each sample ... Method for Organic Chemical Analysis of Municipal and Industrial Wastewater (January 2008) 2.28 US EPA Method 625: Base/Neutrals and Acids, 40 CFR 136 Appendix A, Method for Organic Chemical Analysis...

Ngày tải lên: 14/03/2014, 20:20

... contributions to ambient VOCs at the site Due to the complexity of VOC variation and the rapid changes in VOC sources in the PRD region, more simultaneous measurements of ambient VOCs with CO, NOx, ... ratios of VOC species at Guangzhou and Xinken Figure shows the averages of the total quantified PRD VOC mixing ratios and the relative contributions from the major VOC groups The highest total VOC mixing ... degradation 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...

Ngày tải lên: 14/03/2014, 20:20

... of 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 ... “The Collection and Preservation of Aqueous and Solid Samples for Volatile Organic Compound (VOC) Analysis,” a useful reference for VOC sampling and analysis.) Soil was deleted as an option for Method ... concentrations of VOCs that have a high affinity for the soil matrix) 7.0 ADDITIONAL BACKGROUND Traditional practices for the sampling and analysis of volatile organic compounds (VOCs) in soil have...

Ngày tải lên: 14/03/2014, 20:20

... expandable foam insulation VOC Volatile Organic Chemical vi EXECUTIVE SUMMARY This document superseded the previously submitted interim report titled “INTERIM REPORT: VOC AND ALDEHYDE EMISSIONS ... Plus; TSI) Air Sampling and Analysis Volatile Organic Chemicals VOC samples were collected and analyzed following USEPA Methods TO-1 and TO-17 (USEPA 1999) VOCs were collected onto multibed sorbent ... 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:...

Ngày tải lên: 22/03/2014, 14:20

... the 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 ... reduction of VOC emissions from this sector Question 2: Safety and Toxicity of Low -VOC Products Q: Are the low -VOC products safer and less toxic than their high -VOC counterparts? A: The VOC concentration ... that over kilotonnes of VOCs are emitted each year from coatings and surface cleaners used in automotive refinishing operations in Canada The Volatile Organic Compound (VOC) Concentration Limits...

Ngày tải lên: 28/03/2014, 19:20

... 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 ... Decay-adjusted chemical 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 ... 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...

Ngày tải lên: 05/03/2014, 20:20

... 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 metropolitan area Measurable VOCs as ... models could be made A photochemical 0-D box model, the NCAR Master Mechanism www.atmos-chem-phys.net/10/2353/2010/ E C Apel et al.: Chemical evolution of volatile organic compounds 2355 produce ... classes of VOC species This will be used to help understand the chemical transformation of air parcels as they are exported out of and downwind of the MCMA For organic compounds the VOC + OH reaction...

Ngày tải lên: 28/03/2014, 20:20

Ngày tải lên: 12/04/2015, 14:24

Ngày tải lên: 12/04/2015, 14:24

... have not been precisely defined; however, each chemical compound should be treated as a potential health hazard From this viewpoint, exposure to these chemicals must be reduced to the lowest possible ... safe handling of the chemicals specified in this method A reference file of material data handling sheets should also be made available to all personnel involved in the chemical analysis Additional ... (Revised, January 1976) “Safety in Academic Chemistry Laboratories,” American Chemical Society Publication, Committee on Chemical Safety, 3rd Edition, 1979 Provost, L.P and Elder, R.S “Interpretation...

Ngày tải lên: 14/02/2014, 03:20

... to all three types of xylene (meta-, ortho-, and para-xylene) Xylene is mostly a human-made chemical Chemical industries produce xylene from petroleum Xylene also occurs naturally in petroleum ... a human-made chemical that is widely used for dry cleaning of fabrics and for metal-degreasing operations It is also used as a starting material (building block) for making other chemicals and ... 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 is produced by chemical companies to make...

Ngày tải lên: 14/02/2014, 03:20

... the purge and trap system should be avoided 3.2 Samples can be contaminated by diffusion of volatile organics through the septum seal into the sample during shipment and storage A field reagent ... has not been precisely defined; however, each chemical compound should be treated as a potential health hazard From this view point, exposure to these chemicals must be reduced to the lowest possible ... safe handling of the chemicals specified in this method A reference file of material data handling sheets should also be made available to all personnel involved in the chemical analysis Additional...

Ngày tải lên: 14/02/2014, 03:20

... those used in MOCVD in an MBE-like growth chamber The result is called the “metal -organic MBE”—MOMBE—(also known as chemical beam epitaxy” technique).[15][16] As mentioned in the first paragraph, ... abbreviations for sources throughout this chapter Table in Sec 3.1 provides the abbreviation, chemical name, and chemical formula for most of the commercially available and useful organometallics This ... and chemical properties of the sources that are used in MOCVD Because the sources used in MOCVD have rather unique physical properties, are generally very toxic and/or pyrophoric, and are chemically...

Ngày tải lên: 14/02/2014, 03:20

... amounts of chemicals We have extended the application of EESI to instantly follow organic chemical reactions in a straightforward manner, with a rather simple setup Two important chemical reactions ... Copyright # 2008 John Wiley & Sons, Ltd from organic solvents usually present in reactions, the rapid detection and monitoring of both semi -volatile and nonvolatile compounds by EESI can be carried ... matrices, EESI-MS is able to track the chemical dynamics of simple reactions (e.g elementary reactions) and complicated chemical reactions (e.g heterogeneous chemical reaction, and reactions involving...

Ngày tải lên: 14/02/2014, 08:20

... also some regions 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 ... interactions between NOx, AVOCs, BVOCs, and the transport of various chemical species, which together determine O3 concentrations: e.g it is possible that increases in BVOC emissions would not have ... of the region, legislated decreases in AVOC emissions were masked by approximately equal increases in BVOC emissions, which may help to explain why the AVOC emission reductions did not lead to...

Ngày tải lên: 14/02/2014, 08:20

... and positions Toxic organic chemicals Once an organic chemical is labeled as a contaminant, the implication is that it is potentially dangerous, or toxic In some cases, these chemicals were created ... retardants (PBDEs) How different organics behave in the environment Organic chemicals can be placed into two broad groups: hydrophilic and hydrophobic The hydrophobic chemicals are not generally soluble ... these hydrophobic organic chemicals are added to soil with biosolids, they will most likely stick (partition) onto either the organic compounds in the biosolids or the soil organic matter When...

Ngày tải lên: 14/02/2014, 08:20

... calibrated with the reference VOC specified in the applicable regulation, the available instrument may be calibrated with one of the VOC to be measured, or any other VOC, so long as the instrument ... reference compound 3.4 No detectable emission means a local VOC concentration at the surface of a leak source, adjusted for local VOC ambient concentration, that is less than 2.5 percent of the ... 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...

Ngày tải lên: 14/02/2014, 08:20