volatile organic compounds in petroleum products

... membrane lining of the inner surfaces of the eye conjunctivitis—Inflammation of the conjunctiva This results in eye redness, a thick discharge, sticky eyelids upon waking in the morning, and inflammation ... fever, joint pains, nose bleeds, abdominal pain, and vomiting, progressing to chest pain, and, in advanced cases, heart failure rheumatoid arthritis—A chronic, destructive, often deforming, collagen ... is that of locating areas most likely to be source origins and including only these in the sample, not the disassociated areas as well For instance, if complaints generally arise in a given area...

Ngày tải lên: 11/08/2014, 07:20

... 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...

Ngày tải lên: 14/02/2014, 03:20

... 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 ... COATING PRODUCTS This section specifies the procedure for determining the percent by weight of the reactive organic compounds contained in aerosol coating products, for the purpose of determining ... contained in aerosol coating products, as that term is defined in Title 17, CCR, section 94521 1.2 Method 310 determines the total volatile material in a product and the presence of any compounds...

Ngày tải lên: 14/03/2014, 20:20

... 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/ ... determine the exact starting and ending points of the noise interval, the selected noise range should be sufficiently long to reflect the noise information In this example, the selected interval ... strictly speaking, each measurement should have its own uncertainty, it is practical since it produces satisfactory analysis results Finally, the estimated uncertainties for the compounds in this study,...

Ngày tải lên: 22/03/2014, 14:20

... identified as a single point in Fig Point (∼17:00) is an interception of the plume at a lower altitude upon return into the MCMA The higher mixing ratios of MTBE at the beginning and the end of ... recorded each minute; during some over-city runs the instrument recorded benzene and toluene measurements at Hz in order to obtain flux profiling in the MCMA (Karl et al., 2009) The TOGA instrument ... of volatile organic compounds also to interpret the OH reactivity in the downwind plume The results showed generally good agreement for the total VOC OH reactivity downwind and also gave insight...

Ngày tải lên: 28/03/2014, 20:20

... 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 ... classified as nonmethane organic compounds (NMOCs) or nonmethane hydrocarbons (NMHCs) [3] Volatile organic compounds (VOCs) are important component of NMOC which have been found in landfill gases with ... analyser, the total concentration of nonmethane organic compounds in the landfill site is determined to be 2500 ppm Field studies also indicate that the time since closure of the landfill is 42 years,...

Ngày tải lên: 05/09/2013, 16:11

... 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 safe for operation in explosive ... the interface periphery while observing the instrument readout If an increased meter reading is observed, slowly sample the interface where leakage is indicated until the maximum meter reading ... applicable ducting or piping exists Also, determine if any sources exist in the ducting or piping where emissions could occur upstream of the control device If the required ducting or piping exists...

Ngày tải lên: 14/02/2014, 08:20

... undoubtedly been present in chlorinated drinking water since the first continuous municipal application of chlorination in 1908.(4) The production and use of manmade organic compounds, many of which ... of drinking-water supplies including the monitoring of river intakes and production wells of large CWSs, as well as the continued sampling of domestic wells In addition, major factors that influence ... detected compounds is presented in the fifth chapter Major findings and conclusions Introduction VOCs in ground water 16 VOCs in samples from drinking-water...

Ngày tải lên: 14/03/2014, 19:20

... manufacturers and other agencies in planning and conducting equipment verification testing, evaluating data generated by such testing, and managing and disseminating information The manufacturer ... loading rate S = stripping factor Cfeed = mass concentration of the VOC of interest in the feed water Cfin = mass concentration of the VOC of interest in the finished water Thus in air stripping, ... stripping system, including the initial mass concentration of VOCs of interest in the feed water and potentially including the calculated potential for precipitative scaling, and a measured indication...

Ngày tải lên: 14/03/2014, 19:20

... automobile refinishing is performed in conjunction with other body repair necessitated by a collision involving the vehicle Most refinishing jobs involve the repair and repainting of a small ... a panel) A minority of jobs involve the overall repainting of vehicles, which is generally performed in instances of coating failure 3- Definite steps must be followed when refinishing a vehicle, ... practice in the automobile refinishing industry is to apply all coatings, whether primer, basecoat, or clearcoat, using a hand-held air atomized spray gun This gun atomizes the coating into tiny droplets...

Ngày tải lên: 22/03/2014, 14:20

... 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 ... (gaseous) organic compounds VVOC Volatile organic compounds VOC organic compounds associated with particulate matter or particulate organic Boiling-point range* Sampling media typically used in field ... 1997 Printed in Italy The amount of volatile organic compounds in indoor air, often called TVOC (total volatile organic compounds) , has been measured for various purposes using different definitions...

Ngày tải lên: 28/03/2014, 19:20

... degradation of proteins, especially those that contain cysteine and methionine, or peptides and aminoacids that are present in the salivary/gingival crevicular fluid or in food that is retained on the ... hot-embossing process using a brass stamp, machined by CNC micromachining (Supermill-2M, KIRA Corporation, Nishio, Aichi, Japan) The microfluidic structure integrated two channels (single inlet-single ... characteristic interference pattern with Fabry-Perot fringes [14] Binding of the molecular species on the pore surface induces changes of refractive index and wavelength shifts in the fringe pattern...

Ngày tải lên: 18/06/2014, 22:20

... degradation of proteins, especially those that contain cysteine and methionine, or peptides and aminoacids that are present in the salivary/gingival crevicular fluid or in food that is retained on the ... hot-embossing process using a brass stamp, machined by CNC micromachining (Supermill-2M, KIRA Corporation, Nishio, Aichi, Japan) The microfluidic structure integrated two channels (single inlet-single ... characteristic interference pattern with Fabry-Perot fringes [14] Binding of the molecular species on the pore surface induces changes of refractive index and wavelength shifts in the fringe pattern...

Ngày tải lên: 20/06/2014, 04:20

... characteristic interference pattern with Fabry-Perot fringes [14] Binding of the molecular species on the pore surface induces changes of refractive index and wavelength shifts in the fringe pattern ... characterisation, assembly of RIfS sensing device, testing of sensing performance data processing and composition of the draft manuscript LP was involved in designing and in the fabrication of the microfluidic ... based on the affinity of gold surface to binding HS groups A practical biomedical Figure Real-time measurement of total VSCs Result obtained from two volunteers showing increasing EOT signal when...

Ngày tải lên: 20/06/2014, 23:20

... Hydroxyproline 3.6 0.009 Isoleucine 92.2 0.2305 Leucine 135.2 0.338 Lysine 94.6 0.2365 Methionine 23.9 0.05975 Ornithine 198.8 0.497 Phenylalanine 88.4 0.221 0.52325 Proline 209.3 Threonine 73.2 ... initial increase in H2S production, which was observed following rehydration with nutrients, was the amino acid component of the mixture (detailed in Table 2) Rehydration in a solution containing ... presence in wine is regarded as a sensory fault Although the subject of H2 S formation during fermentation is well studied, the factors leading to residual H S in the final wine remain to be...

Ngày tải lên: 20/06/2014, 23:20

... analysis and interpretation of data, involved in drafting the articles MG: substantial contribution to conception and design, statistical analysis and interpretation of data, involved in drafting the ... 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 exposure: a review Int Arch Occup ... screen: a volatile issue in lung cancer Chest 2003, 123:1788-1792 Bach PB, Elkin EB, Pastorino U, Kattan MW, Mushlin AI, Begg CB, Parkin DM: Benchmarking lung cancer mortality rates in current...

Ngày tải lên: 12/08/2014, 18:21

... 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...

Ngày tải lên: 12/04/2015, 14:24

... eggshell thinning and reproductive failure Consequently, DDT use was banned in the U.S in 1973, in U.K in 1984 and restricted in Canada in 1985 (Wilkinson, 2002) Approximately 2.5 billion people in over ... retardant in lubricating oils and as a cooling and insulating fluid for industrial transformer and capacitors In addition, PCBs were also used as plasticizers in sealants, caulkings, synthetic resins, ... Seasonal Trends of Semi -Volatile Organic Contaminants In Ambient Air and Rainwater In Singapore 68 5.1 Introduction 68 5.2 Experimental 69 5.2.1 Sampling ...

Ngày tải lên: 11/09/2015, 10:15

... (1983) noted that whereas increasing the EBCT by increasing the bed depth can bring about sharp reductions in numbers of organisms in GAC filtrate, increasing EBCT by decreasing flow rate did not ... percent remaining versus carbon dose line, and the C0 = 176 µg/L line is only slightly higher All the MIB data in Figure 13.6 plot on one line in Figure 13.8 FIGURE 13.8 Percent MIB remaining as a ... derived 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...

Ngày tải lên: 14/02/2014, 03:20