concentrations of selected volatile organic compounds vocs in samples of untreated gro
DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc
... TESTING TO DETERMINE REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS This section specifies the procedure for determining the percent by weight of the reactive organic compounds contained ... 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 ... portion, excluding container and packaging = weight (gm) of exempt compounds in propellant For aerosol products containing LVP-VOC, the percent VOC shall be calculated using the following equation:...
- 23
- 830
- 0
Total Volatile Organic Compounds (WOC) in Indoor Air Quality Investigations doc
... 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, ... and Lindvall, T., 1993 Volatile organic compounds in ventilating air in buildings at different sampling points in the building and their relationship with the prevalence of occupant symptoms Indoor ... contained in a list of known VOCs of special interest and those representing the 10 highest peaks The list of compounds of special interest is shown in Appendix Calculate Sid(mglm ), i.e the sum of...
- 48
- 348
- 0
Source Identification of Volatile Organic Compounds in Houston, Texas pdf
... 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 each wind direction/ ... by a random series (d) Select an interval of noise in mfc Although it is difficult to determine the exact starting and ending points of the noise interval, the selected noise range should be sufficiently ... Model In general, the ordinary bilinear receptor model can be written as X ) GFT + E (1) where X is the matrix of VOCs concentrations, F is the matrix of source profiles, G is the matrix of source...
- 10
- 602
- 0
Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area potx
... transformation of VOCs downwind of the metropolitan area Measurable VOCs as defined here consist of non-methane hydrocarbons (NMHCs) and oxygenated volatile organic compounds (OVOCs), including formaldehyde ... analyses In this paper we 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 ... evolution of volatile organic compounds detailed gas phase chemistry (NCAR Master Mechanism), initialized with concentrations observed at one of the ground sites in the MCMA, was used to examine the...
- 23
- 412
- 0
Tài liệu Glossary of Volatile Organic Compounds ppt
... naturally in crude oil and in the tolu tree It is produced in the process of making gasoline and other fuels from crude oil Toluene is also used in making paints, paint thinners, fingernail polish, ... as a cleaning fluid, in industry and dry cleaning businesses, and in the household Carbon tetrachloride also was used in fire extinguishers and as a fumigant to kill insects in grain These uses ... polystyrene packaging material People are exposed to styrene by breathing contaminated air or eating or drinking contaminated food or water Styrene can also pass through the skin into the body Health...
- 11
- 451
- 0
Chemical Composition of Vehicle-Related Volatile Organic Compound Emissions in Central California pdf
... understanding sources of VOC with respect to the ozone problem There is also increasing interest in using these models to expand knowledge regarding the role of different VOC in the formation of secondary ... apply in areas with serious ozone air pollution problems, use of oxygenates in gasoline is a firm requirement in most of the rest of California including Sacramento and the San Joaquin Valley In ... Abundance of individual VOC in tunnel emissions for uphill vs downhill driving during summer 2001 17 with downhill driving and much lighter engine load Interestingly, the absolute concentrations of...
- 44
- 474
- 0
Volatile Organic Compounds in the Nation’s Ground Water and Drinking-Water Supply Wells pdf
... of 55 volatile organic compounds (VOCs) in ground water gives emphasis to the occurrence of VOCs in aquifers that are used as an important supply of drinking water In contrast to the monitoring ... Multiple VOCs Total number of VOCs that occurred in mixtures Number of VOCs occurring only in mixtures Frequency of well samples with a single VOC detection, in percent Frequency of mixtures in all ... detection of VOCs in aquifers is important because of the widespread, large, and increasing use of ground water for drinking water In 2000, about 50 percent of the Nation’s population obtained their...
- 112
- 573
- 0
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
... identifying biomarkers of early lung cancer probably require the use of a panel rather than single substances [17] The main finding of our study was that none of selected VOCs alone distinguished ... of the condition being examined in the population at hands Owing to the low prevalence of NSCLC even in selected groups at high risk, the positive predicted value of exhaled VOCs is expected to ... the exact origin of exhaled VOCs remains to be demonstrated, principal components analysis (PCA) factorised the compounds into three groups (table 4) and suggests some fascinating hypoteses It...
- 10
- 426
- 0
Occurrence and fate of semivolatile organic compounds (SVOCs) in the tropical atmosphere
... 2.7 Selected SVOCs in the Marine Environment of Singapore 34 2.7.1 Usage and Emission of Selected SVOCs in Singapore 34 2.7.2 Occurrence of Selected SVOCs in the Environment of Singapore ... identified in the context of understanding the fate and transfer of SVOCs in SEA are summarized below: I Determination of atmospheric SVOCs by means of chemical analyses is often time-consuming due ... used in this study (source indicated in the text) 159 Table 8.2 Annual Mean Atmospheric Fluxes of selected SVOCs 164 Table 8.3 Concentrations of SVOCs in SSW, SML and atmospheric gas phases during...
- 231
- 263
- 0
Microorganisms Associated with Volatile Organic Compound Production in Spoilt Mango Fruits docx
... of sensory cues such as off-colours, offodours, off- flavours, softening of vegetables and fruits, and slime However, even before it becomes obvious, microbes have begun the process of breaking ... methods for detection of spoilage have been devised with the goals of determining concentrations of spoilage microbes or volatile compounds produced by these microbes However, many of these methods ... using GC-MS-QP2010 plus (Shimadzu, Japan) equipped with flame ionization detector (FID) The injection was conducted in split less mode at 250 C for 3min by using an inlet of 0.75 mm i.d to minimize...
- 6
- 445
- 0
ALDEHYDE AND OTHER VOLATILE ORGANIC CHEMICAL EMISSIONS IN FOUR FEMA TEMPORARY HOUSING UNITS – FINAL REPORT pdf
... vinyl textured white vinyl finish with finish with unfinished veneer unfinished veneer backing backing vinyl laminant with vinyl laminant with unfinished veneer unfinished veneer backing backing ... backing Low pile with backing vinyl floor vinyl with slight residue of glue on back vinyl does not have indication of glue vinyl does not have indication of glue vinyl does not have indication of ... “Background concentrations of 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...
- 61
- 358
- 0
báo cáo hóa học:" Enhanced serum concentrations of transforming growth factor-beta1 in simple fatty liver: is it really benign?" pot
... in clinical settings [1] The definition of "benignity" concerning FL is wideaccepted [2] but conceptually difficult to maintain because the mechanisms, i.e., insulin resistance (IR), underlying ... Observation of liver fibrosis in a rat model of NASH suggests that iron induces increase in hepatocytes apoptosis and contributes to the development of fibrosis directly or indirectly via induction of ... insulin resistance and beta-cell function from fasting plasma glucose and insulin concentrations in man Diabetologia 1985, 28:412-9 Forsberg L, Halldin J, Ekman S, Rönnberg S: Screening of binge...
- 8
- 387
- 0
Báo cáo y học: "Plasma concentrations of Gas6 (growth arrest specific protein 6) and its soluble tyrosine kinase receptor sAxl in sepsis and systemic inflammatory response syndromes" pps
... bilirubin, Gas6, procalcitonin and number of failing organs, indicating that both Gas6 and sAxl are increased in inflammatory states Gas6 and sAxl are increased during organ failure, and Gas6 is increased ... Heparin-binding protein: an early marker of circulatory failure in sepsis Clin Infect Dis 2009, 49:1044-1050 Page of 17 Balogh I, Hafizi S, Stenhoff J, Hansson K, Dahlbäck B: Analysis of Gas6 in ... increased in patients receiving intensive care or experiencing kidney failure, again indicating that Gas6 is increased in severe inflammatory states There is a nonsignificant trend to higher Gas6 in...
- 5
- 238
- 0
CÁC CÔNG NGHỆ XỬ LÝ H2S VÀ VOC (VOLATILE ORGANIC COMPOUNDS) TRONG KHÍ THẢI
... mạch, vùng sinh phản xạ thần kinh động mạch cảnh - Thường xuyên tiếp xúc với H2S nồng độ mức gây độc cấp tính gây nhiễm độc mãn tính Các triệu chứng là: suy nhược, rối loạn hệ thần kinh, hệ tiêu ... giá Nguồn gốc , lý tính : a Nguồn gốc Trong tự nhiên : Có nước suối, khí núi lửa, thoát từ protein phân hủy Trong công nghiệp : Dihydro sufua loại khí chủ yếu tỏa trình luyện cốc từ than đá, ... Na2CO3 Ngoài ra, người ta dùng amoni cacbonat kali cacbonat làm dung dịch hấp thụ khí H2S Với amin cacbonat, phản ứng xảy sau: (NH4)2CO3 + H2S = (NH4)2S +H2O + CO2 Amomi sunfua (NH4)2S thu dung...
- 17
- 973
- 1
Detection of Pseudomonas aeruginosa in sputum headspace through volatile organic compound analysis potx
... measured a variable range of 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 ... −0.08 Volatile Organic Compounds (VOCs) were ranked according their VID with high values indicating a positive correlation with Pseudomonas aeruginosa infection and negative values indicating a ... growing P aeruginosa [27,28], its odour increases when adding tryptophan This is because 2-aminoacetophenone is an intermediate in the biosynthetic pathway for quinazolines, a pathway branching...
- 9
- 904
- 0
USEPA REGION 9 TECHNICAL GUIDELINES FOR ACCURATELY DETERMINING VOLATILE ORGANIC COMPOUND (VOC) CONCENTRATIONS IN SOIL AND SOLID MATRICES potx
... These guidelines address methods for: (1) handling of samples as intact soil cores; (2) preserving samples; (3) storing samples in hermetically sealed containers; and (4) minimizing analyte losses ... Concentration in Soil and Solid Matrices 1.0 SUMMARY These guidelines address methods for: (1) handling of samples as intact soil cores; (2) preserving samples; (3) storing samples in hermetically ... making (e.g., in excavated soils and when determining disposal or treatment options, or for determining concentrations of VOCs that have a high affinity for the soil matrix) 7.0 ADDITIONAL BACKGROUND...
- 10
- 468
- 0
DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf
... procedures for determination of organic compounds in finished drinking water, source water, or drinking water in any treatment stage The method is applicable to a wide range of organic compounds that ... of field and laboratory reagent blanks provide information about the presence of contaminants 525.2-7 4.2 5.0 Interfering contamination may occur when a sample containing low concentrations of ... recovery of the internal standards in laboratory fortified blanks and samples Internal standard recovery should be in excess of 70% 9.5 With each batch of samples processed as a group within a 12-hour...
- 60
- 528
- 0
Volatile Organic Compound Concentrations and Emission Rates Measured over One Year in a New Manufactured House pptx
... Measuring concentrations of volatile organic compounds in vinyl flooring Journal Air & Waste Management Association 51: 174-185 Hodgson AT 1999 Common Indoor Sources of Volatile Organic Compounds: ... Changes in adjusted mean indoor minus outdoor concentrations of 12 of the 22 VOCs over the course of the study are presented in Figures and These plots show that the concentrations of the predominant, ... observed in an office building (Hodgson et al., 2003) This result indicates the potential importance of sink effects in determining temporal pattern of concentrations and emission rates for less volatile...
- 34
- 600
- 0
Leaching of arsenic in response to organic matter contamination in groundwater treatment practice
... water samples identified that most of the groundwater sources had significant organic contamination (Table 2) In AIRUs (I~IV), in spite of having adequate iron concentrations of 3.4~6.9 mg/L in ... appropriate for drinking water treatment Due to lack of other options/sources, groundwater with high organic contamination is even used in drinking water treatment in the rural areas of Bangladesh ... within the interstices of the filter bed media which provided increased adsorption surfaces and mechanical straining as well Organic matter causes chemical leaching of arsenic in AIRU The leaching...
- 13
- 388
- 0
Estimation of emissions of nonmethane organic compounds from a closed landfill site using a landfill gas emission model
... 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 ... The number of Monte Carlo terms chosen was based on the level of uncertainty believed to exist in the values of the uncertain parameters In Figure 3, the range of values of the age of the studied ... 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 (Print), ISSN 2076-2909 (Online)...
- 8
- 540
- 0
Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản xác định thời lượng học về mặt lí thuyết và thực tế điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến tốc độ rôto n fi p2 động cơ điện không đồng bộ một pha thông tin liên lạc và các dịch vụ