volatile organic compounds sources sampling and analysis
Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells pdf
Ngày tải lên :
14/03/2014, 19:20
... 10. Analysis and Reporting at the Principal-Aquifer Scale Help Link National and Local-Scale Findings Analysis and reporting of NAWQA’s first decade of sampling have focused on national and Study-Unit ... served by public water supply, and are representative of the Nation’s major hydrologic landscapes, priority ecological resources, and agricultural, urban, and natural sources of contamination Each ... design and methods of sampling and analysis The assessments thereby build local knowledge about water-quality issues and trends in a particular stream or aquifer while providing an understanding...
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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
Ngày tải lên :
14/03/2014, 20:20
... 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 ... for Volatile Organics (analysis of exempt and prohibited compounds in the product by headspace/gas chromatography/mass spectrometry) 2.10.1 US EPA Method 8240B, September 1994, Revision 2, Volatile...
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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
Ngày tải lên :
12/08/2014, 18:21
... 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 ... NSCLC and COPD patients, and asymptomatic control smokers and non-smokers A subsequent nested short-term follow-up study of the NSCLC patients was carried out with repeat VOC sampling and analysis ... 6:71 Background Breath analysis seems to be a promising approach to identify new biomarkers of inflammatory and oxidative lung processes, and different volatile organic compounds (VOCs) of endogenous...
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Tài liệu Glossary of Volatile Organic Compounds ppt
Ngày tải lên :
14/02/2014, 03:20
... burning 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 ... human-made activities and natural processes Benzene is widely used in the United States and ranks in the top 20 chemicals used Two natural sources of benzene are volcanoes and forest fires Benzene ... 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...
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Source Identification of Volatile Organic Compounds in Houston, Texas pdf
Ngày tải lên :
22/03/2014, 14:20
... 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, ... random data series, r; (d) the magnitude spectrum of random data series, mfr influencing factors such as wind speed, temperature, and weekday/weekend factors, so with ME an expanded factor analysis ... of weekend/weekday and (2) the c9-benzene, c10-benzene, toluene, xylene, and other compounds in these sources are from refineries that are usually operated in continuous mode, and their emission...
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Total Volatile Organic Compounds (WOC) in Indoor Air Quality Investigations doc
Ngày tải lên :
28/03/2014, 19:20
... Classzjication of indoor organic pollutants (WHO, 1989) Category Description Abbreviation Very volatile (gaseous) organic compounds VVOC Volatile organic compounds VOC organic compounds associated ... Volatile organic compounds, indoor air quality and health Indoor Air, 1(4), 357-376 Mprlhave, L and Nielsen, D.N., 1992 Interpretation and limitations of the concept "Total Volatile Organic Compounds" ... Wager P.A and Schlatter C., 1992 Volatile organic compounds and some very volatile organic compounds in new and reccntly renovated buildings in Switzerland Athmospheric Environment, 26 A (12),...
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Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area potx
Ngày tải lên :
28/03/2014, 20:20
... Sive, B C., Blake, D R., and Rowland, F S.: Description of the analysis of a wide range of volatile organic compounds in whole air samples collected during PEM-Tropics A and B, Anal Chem., 73, ... Chemical evolution of volatile organic compounds 2359 Table Mean methane, carbon monoxide and nonmethane hydrocarbon mixing ratios obtained during sampling the month of March 2006 Standard deviations ... 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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Air Pollution Sampling and Analysis (Laboratory Manual) ppt
Ngày tải lên :
29/03/2014, 14:20
... What it includes: a) Selection of sampling procedures including procedures of analysis of samples b) Sampling locations c) Period of sampling, frequency of sampling and duration d) Auxiliary measurements ... of sampling procedure: There are two types of sampling – continuous and time averaged in –situ samplings Continuous sampling is carried out by automatic sensors, optical or electrochemical, and ... effective average over the period of sampling 1|Page Sampling locations: Sampling locations are in general governed by factors like objectives, method of sampling and resources available If the objective...
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Fundamentals of Environmental Sampling and Analysis doc
Ngày tải lên :
27/06/2014, 17:20
... acquisition and errors associated with field sampling and laboratory analysis A unique feature of this text is to treat sampling and analysis as an entity This is to say that sampling and analysis ... Chromatographic Methods 275 in Environmental Analysis 10.4.1 10.4.2 10.4.3 Gases, Volatile, and Semivolatile Organics with GC Semivolatile and Nonvolatile Organics with HPLC Ionic Species with IC ... Matrices Environmental Sampling Approaches: Where and When 49 52 Judgmental Sampling 52 Simple Random Sampling 53 Stratified Random Sampling 54 Systematic Sampling 56 Other Sampling Designs 57 Estimating...
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Fundamentals of Environmental Sampling and Analysis pdf
Ngày tải lên :
27/06/2014, 17:20
... acquisition and errors associated with field sampling and laboratory analysis A unique feature of this text is to treat sampling and analysis as an entity This is to say that sampling and analysis ... Chromatographic Methods 275 in Environmental Analysis 10.4.1 10.4.2 10.4.3 Gases, Volatile, and Semivolatile Organics with GC Semivolatile and Nonvolatile Organics with HPLC Ionic Species with IC ... Matrices Environmental Sampling Approaches: Where and When 49 52 Judgmental Sampling 52 Simple Random Sampling 53 Stratified Random Sampling 54 Systematic Sampling 56 Other Sampling Designs 57 Estimating...
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Environmental Sampling and Analysis for Metals - Chapter 2 potx
Ngày tải lên :
12/08/2014, 03:20
... organisms and plays an important role in nerve stimulation and muscle function and their physiological functions 2.1.1.4 Rubidium (Rb) and Cesium (Cs) Rubidium and cesium are rare and have little ... reducing agent in the preparation of dyes and other organic compounds An excellent reducing agent, SnCl2 is used in the preparation of dyes and other organic compounds Tin(IV) chloride (SnCl4) is ... Nickel and its compounds have little toxicity Nickel itch or contact dermatitis is the most commonly seen reaction to nickel compounds, © 2002 by CRC Press LLC 26 Environmental Sampling and Analysis...
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Environmental Sampling and Analysis for Metals - Chapter 3 ppt
Ngày tải lên :
12/08/2014, 03:20
... Environmental Sampling and Analysis for Metals Aluminum compounds are used for storing and processing food (e.g., baking powder, cooking vessels, and metal foil) Inhalation of aluminum compounds ... in the brain, liver, and kidneys The major toxicity responses to lead and lead compounds are contact dermatitis and allergic sensitization, but generally nickel and nickel compounds have little ... and mucous membranes, and the barium dispersant in automotive lubricants is a mild eye irritant Barium compounds (nitrate, sulfide, carbonate, and chloride) have been involved in accidental and...
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Environmental Sampling and Analysis for Metals - Chapter 4 docx
Ngày tải lên :
12/08/2014, 03:20
... vessels, and storage tanks; these sources are classified as point sources (e.g., chimneys) and area sources (e.g., parking lots and industrial facilities) © 2002 by CRC Press LLC Standards Related ... uniformly along river and stream banks, the cleaning effect by purging does not work well Rivers, streams, and lakes contain many organic and inorganic nutrients needed by the plants and animals that ... samples, and another accepted method should be run to check the effectiveness of the MMO-MUG test 4.2.3.6 Synthetic Organic Chemicals (SOCs) and Inorganic Chemicals (IOCS) The rule for synthetic organic...
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Environmental Sampling and Analysis for Metals - Chapter 7 docx
Ngày tải lên :
12/08/2014, 03:20
... standard To confirm the calibration curve and to verify the accuracy of the standards and the calibration, run a standard prepared from another source as the calibration standards Prepare standard ... Add ml of this stock solution to each 100-ml standard and sample prior to analysis © 2002 by CRC Press LLC 116 7.7.2 Environmental Sampling and Analysis for Metals SPECTRAL INTERFERENCES Spectral ... cannot be matched accurately with standards, use the method of standard addition (see Section 7.7.1) If © 2002 by CRC Press LLC 110 Environmental Sampling and Analysis for Metals digestion or another...
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Environmental Sampling and Analysis for Metals - Chapter 8 docx
Ngày tải lên :
12/08/2014, 03:20
... off acetylene first and then air © 2002 by CRC Press LLC 124 Environmental Sampling and Analysis for Metals 8.2.5 STANDARDIZATION Select at least three concentrations of each standard metal solution ... Environmental Sampling and Analysis for Metals 15 Aspirate standard of desired metal with concentration near the midpoint of the optimum concentration range and adjust burner (both vertically and horizontally) ... Preparation of standards and complete calibration processes are discussed in Section 6.6 Calibrate Ca and Mg based on concentration of standards before dilution with lanthanum solution; Fe and Mn based...
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Environmental Sampling and Analysis for Metals - Chapter 12 doc
Ngày tải lên :
12/08/2014, 03:20
... matrix-matched standards or by using the standard additions method © 2002 by CRC Press LLC 174 Environmental Sampling and Analysis for Metals 12.5 REAGENTS AND STANDARDS 12.5.1 CHEMICALS, STANDARDS, AND REAGENTS ... Environmental Sampling and Analysis for Metals analyzed sample, such as traces of argon and CO2 from argon gas, H2 and O2 when water is the solvent, C from organic solvent, and H2, O2, and N2 from ... Mixed standard solution III: Mixed standard solution IV: Mixed standard solution V: Be, Cd, Mn, Pb, Se, and Zn Ba, Co, Cu, Fe, and V As, Mo, and Si Al, Ca, Cr, K, Na, and Ni Ag, B, Mg, Sb, and Tl...
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Environmental Sampling and Analysis for Metals - Chapter 14 pptx
Ngày tải lên :
12/08/2014, 03:20
... aspirator, and special safety clothing, shoes, and hazard hat After sampling, clothes, shoes, and hat must be removed Each time after sampling, the sample collector must wash hands and exposed ... grounded and all sources of ignition should be prohibited As a general rule, avoid eating and smoking during sampling 14.9.9 SAMPLING FISH TISSUES Fish tissues are usually analyzed for metals and organic ... turbulence and humidity) 14.9.10.1 Sampling and Storage of Particles Many sampling methods are available, and the method selected depends on the purpose of the sampling For example, for chemical analysis, ...
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Environmental Sampling and Analysis for Metals - Chapter 15 pdf
Ngày tải lên :
12/08/2014, 03:20
... addition and evaporation Cool solution and add 20 ml of HClO4 and ml of HF, and boil until solution is clear and white fumes of HClO4 have appeared Cool, add about 50 ml of DI water, filter, and proceed ... continuously), and immediately attach to the aeration apparatus and analyze Blanks, calibration standards, QC check standards, and spiked samples must be treated the same way 15.9.2 PREPARATION OF SOLID AND ... methyl-isobutyl-ketone) Organometallic standards are prepared using the same solvent, and the samples and standards are analyzed via AAS or ICP 15.11.2 SAMPLE COLLECTION, PRESERVATION, AND HANDLING All samples must...
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Environmental Sampling and Analysis for Metals - Chapter 18 ppt
Ngày tải lên :
12/08/2014, 03:20
... 270 Environmental Sampling and Analysis for Metals 18.1.1.3 Methods and References for Analyzing Water Sources (Surface and Groundwater) Pursuant to 40 CFR Part 261 ... Procedures for Handling and Chemical Analysis of Sediments and Water Samples (EPA/Corps of Engineers, CE-81–1, 1981) USEPA Contract Laboratory Program Statement of Work for Inorganic Analysis (EPA ... flask and dilute to the mark with DI water Standardize against standard 0.02N CaCO3 solution 18.9.2.2.4 Calcium Carbonate Standard Solution Weigh 1.0000 g of anhydrous CaCO3 (primary standard) and...
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Environmental Sampling and Analysis for Metals - Chapter 19 (end) ppsx
Ngày tải lên :
12/08/2014, 03:20
... dangerous and devastating In case of fire, stay calm and think! Sources of fires include electrical equipment, friction, mechanical sparks, flames, hot surfaces, and flammable organic compounds ... England, 1993 Salisbury, F.B and Ross, C.W., Plant Physiology, Wadsworth, Belmont, CA, 1992 © 2002 by CRC Press LLC 332 Environmental Sampling and Analysis for Metals Szabo, L., Kevey, B., and ... MSDSs contain ingredients, physical and chemical characteristics of the substance, physical hazards, reactivity and health hazards involved, and safe handling and safety precautions In addition,...
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