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sulfur hexafluoride DETERMINATION

sulfur hexafluoride DETERMINATION

Senior R, Moreo A, Gaibazzi N, et al. Comparison of sulfur hexafluoride microbubble (SonoVue)-enhanced myocardial contrast echocardiography with gated single-photon emission computed tomography for detection of significant coronary artery disease: a large European multicenter study. Journal of the American College of Cardiology.

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  • Sulfur hexafluoride | F6S - PubChem

    Sulfur hexafluoride is a sulfur coordination entity consisting of six fluorine atoms attached to a central sulfur atom. It is the most potent greenhouse gas currently known, with a global warming potential of 23,900 times that of CO2 over a 100 year period (SF6 has an estimated lifetime in the atmosphere of between 800 and 3,000 years).

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    Sulfur hexafluoride - Wikipediaen.wikipedia.orgConvert moles Sulfur Hexafluoride to grams - Conversion ofwww.convertunits.comMolecular weight of SF6 - Convert Unitswww.convertunits.comSulfur hexafluoride | F6S | ChemSpiderwww.chemspider.com/Chemical-Str…SF6 Molecular Geometry, Lewis Structure, Shape, and Polaritygeometryofmolecules.comRecommended to you based on whats popular • Feedback

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  • Improvements in the determination of sulfur hexafluoride

    May 01, 2002Tracing atmospheric pollutants by gas chromatographic determination of sulfur hexafluoride. Environmental Science Technology 1973, 7 (4) , 338-342. DOI: 10.1021/es60076a002. Nitin Ohri, Andreas Kaubisch, Madhur Garg, ChandanCited by: 19

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  • Simultaneous determination of sulfur hexafluoride and

    May 01, 2002We have developed an analytical technique for the simultaneous measurement of the four trace gases sulfur hexafluoride (SF 6) and the chlorofluorocarbons CCl 2 F 2 (CFC-12), CCl 3 F (CFC-11) and CCl 2 FCClF 2 (CFC-113) in water and air. Water samples are flame sealed into 350-ml glass ampoules which allow storage and sampling in locations where field measurements are not practical.Cited by: 69

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  • A rapid method for the measurement of sulfur hexafluoride

    A rapid headspace method for the simultaneous laboratory determination of intentionally introduced hydrologic tracers, sulfur hexafluoride (SF6), trifluoromethyl sulfur pentafluoride (SF5CF3), Halon 1211 (CF2ClBr), and other halocarbons in water and gases is described.

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  • A rapid method for the measurement of sulfur hexafluoride

    A rapid headspace method for the simultaneous laboratory determination of intentionally introduced hydrologic tracers, sulfur hexafluoride (SF 6), trifluoromethyl sulfur pentafluoride (SF 5 CF 3), Halon 1211 (CF 2 ClBr), and other halocarbons in water and gases is described.Cited by: 17

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  • Ventilation Testing – Determining Air Changes Per Hour

    Mar 20, 2019Another method is by using a tracer gas injected into the supply system—or space itself and measure the reduction in tracer gas over a fixed time. The most common gas to use is sulfur hexafluoride (SF 6) since it is relatively non-toxic (OSHA PEL is 1,000 ppm) and is not naturally present in the air so it is easy to detect.

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  • Handling and Use of Sulfur Hexafluoride Gas

    Handling and Use of Sulfur Hexafluoride Gas Page 4 of 8 V. PROCEDURE A. Handling of Sulfur Hexafluoride Gas - Central Facilities. 1. All SF 6 gas shall be obtained through a central facility. 2. The designated central facility is responsible for maintaining a log

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  • Lab Report - Determination of Critical Point - MLT 4

    Sulphur Hexafluoride is used due to several reasons. of SF6 is at a much lower critical temperature and pressure than most other substances. The critical temperature of SF6 is 45.5oC and the critical pressure is 37.6 bars. These conditions are safe and relatively easy to simulate in a laboratory. Also SF6 is non-toxic to humans but in considerable

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  • Simultaneous Determination of Chlorofluorocarbons and

    Jul 01, 2016Sulfur hexafluoride (SF6) is also a synthetic compound which has been used in the electrical industry since the 1960s. It is an inert, nontoxic, non-corrosive gas, which makes it widely applicable to metal smelting. Entry of CFCs and SF6 into the ocean is through air-sea exchange.Cited by: 2

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  • Simultaneous Determination of Chlorofluorocarbons and

    Chlorofluorocarbons (CFCs) and sulfur hexafluoride (SF6) are types of anthropogenic halogenated compounds, and are very important for ocean processes, including air-sea and water mass exchanges.

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  • Sulfur hexafluoride. SF₆ - Linde Gas

    Sulfur hexafluoride. SF₆ Product information Characteristics Physical data Product specification Shipping information Sulfur hexafluoride is used for plasma etching prior to chemical vapor deposition (CVD). Its uses include oxide etching, nitride etching, and wafer cleaning. Sulfur hexafluoride is also used in plasma chamber cleaning processes.

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  • Determination of diapycnal diffusion rates in the

    Determination of diapycnal diffusion rates in the upper thermocline in the North Atlantic Ocean using sulfur hexafluoride. Journal of Geophysical Research, 2005 A sulfur hexafluoride- oceanic regions and in different seasons to determine key based Lagrangian study on initiation and accumulation of the red tide Cochlodinium polykrikoides in

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  • Material Safety Data Sheet

    Sulfur Hexafluoride 4 . First-aid measures Immediately flush eyes with plenty of water, occasionally lifting the upper and lower eyelids. Check for and remove any contact lenses. Get medical attention if irritation determination of hazardous substances will also be required. Environmental exposure

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  • Determination of the atmospheric lifetime and global

    Determination of the atmospheric lifetime and global warming potential of sulfur hexafluoride using a three-dimensional model January 2017 Atmospheric Chemistry and Physics 17(2):883-898

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  • Automatic Determination of Greenhouse Gases by GC

    Automatic Determination of Greenhouse Gases by GC . 2 Introduction •Greenhouse gases (GHG) are defined as trace components •Sulfur Hexafluoride (SF 6) •Changes in the atmospheric GHG concentration are usually determined by gas chromatography and used for calculating

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  • Concentration and ultrasensitive chromatographic

    Jul 01, 1968Concentration and ultrasensitive chromatographic determination of sulfur hexafluoride for application to meteorological tracingCited by: 23

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  • Aircraft Release of Sulfur Hexafluoride as an Atmospheric

    Sulfur hexafluoride gas (SFe) has been widely employed for some years as a tracer in studies of atmospheric transport and dispersion.15 Advantages of this material for such application include high sensitivity for determination by electron capture detection following

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  • SULFUR HEXAFLUORIDE by portable GC 6602

    NOTE 2: Determination of sulfur hexafluoride concentration expressed in pg/mL (i.e., mg/m3) can be accomplished by establishing lab and field calibration graphs (Steps 4 and 5) of peak height or area vs mass of analyte in mg. V a in Step 6 would then become M a, mass of analyte.]

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  • 40 CFR Appendix A to Subpart DDDD of Part 63 - Alternative

    This procedure is applicable for the determination of capture efficiency for enclosures around hot presses and is an alternative to the construction of temporary total enclosures (TTE). Sulfur hexafluoride (SF 6) is used as a tracer gas (other tracer gases may be used if approved by the EPA Administrator). This gas is not indigenous to the

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  • Guidelines – Sulphur Hexafluoride Management

    Sulphur hexafluoride is a greenhouse gas, and wilful venting to the atmosphere is illegal (refer to Section 9). IEC 60376:2005 Specification of technical grade sulfur hexafluoride (SF6) for use in electrical equipment, Determination 2008, Department of the Environment, Commonwealth of

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  • ACP - Determination of the atmospheric lifetime and global

    Abstract. We have used the Whole Atmosphere Community Climate Model (WACCM), with an updated treatment of loss processes, to determine the atmospheric lifetime of sulfur hexafluoride (SF 6). The model includes the following SF 6 removal processes: photolysis, electron attachment and reaction with mesospheric metal atoms.Cited by: 23

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  • Airborne Labs Internationals Sulfur Hexafluoride (SF6

    Sulfur Hexafluoride (SF6) Test Programs . Obtaining detailed SF 6 quality information by ALI’s ISO/IEC 17025:2005 accredited gas laboratory is an easy, rapid and straightforward process using ALI’s SF 6 No-Haz recover recycle “green” sampling shipping kits.

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  • Clinical utility, dose determination, and safety of ocular

    Abstract Objective: To determine efficacy of contrast-enhanced ultrasonography (CEUS) using different sulfur hexafluoride (SF6) doses to assess blood flow and perfusion in

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  • Local Coverage Determination for Echocardiography for

    Senior R, Moreo A, Gaibazzi N, et al. Comparison of sulfur hexafluoride microbubble (SonoVue)-enhanced myocardial contrast echocardiography with gated single-photon emission computed tomography for detection of significant coronary artery disease: a large European multicenter study. Journal of the American College of Cardiology.

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  • Safety of intravenous application of second-generation

    The goal of the work described here was to assess the safety profile of intravenous second-generation ultrasound contrast agents (UCAs) containing sulfur hexafluoride in pediatric contrast-enhanced ultrasound. Between 2010 and 2013, a total of 167 examinations were performed in 137 children referred by the Oncology Department.

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  • 6. ANALYTICAL METHODS

    The sensitivity of this method is enhanced if sulfur hexafluoride-doped hydrogen gas is used (Lioy and Waldman 1989). The advantages of using flame photometric detector analysis include low maintenance, high sensitivity, fast response, and no interference from nonsulfur species. However, this method is unable to discriminate between sulfur species.

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  • Direct determination of the intermolecular interaction

    Dec 01, 1979The experimental values of the first and the second refractivity virial coefficients have been determined for carbon dioxide and sulfur hexafluoride. In the case of carbon dioxide the experimental second refractivity virial coefficient is less than the classically calculated theoretical value and for sulfur hexafluoride the experimental value is larger than the theoretical value.Cited by: 76

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  • ASTM International - ASTM D2284-95 - Standard Test

    1.1 This test method covers the determination of the acidic fluorides of sulfur hexafluoride (SF 6 ). 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety

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  • [DOC]
  • Subpart CC—Cement Production (Draft)

    Web viewTo demonstrate the achievement of carbon dioxide (CO2)-equivalent (CO2e) emissions reductions from a sulfur hexafluoride (SF6) offset project that has received a consistency determination from the Massachusetts Department of Environmental Protection (MassDEP), a Project Sponsor must submit to MassDEP in accordance with the instructions (see

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  • EMISSION FACTORS DEVELOPED BASED ON FIRING

    Fans inside the ECC ensure even distribution of the sulfur hexafluoride (SF6) tracer gas and weapon emission products. A series of 12 ports are located along the sides and top of the chamber to

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  • Determination of Vitality of Liver Lesions by Alveolar

    In comparison to FDG PET-CT, the gold standard for detecting viable lesions by depicting metabolism, CEUS detects viable lesions with high specificity and moderate sensitivity by showing vascularization. CEUS must be regarded as an important tool in monitoring HAE. Dimensions of parasitic lesions ar

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  • ASTM D2284-11(2019) - Standard Test Method for Acidity of

    Standard Test Method for Acidity of Sulfur Hexafluoride. 1.1 This test method covers the determination of the acidic fluorides of sulfur hexafluoride (SF 6). 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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  • Non-invasive determination of cardiac output by the inert

    Non-invasive determination of cardiac output by the inert gas rebreathing method in a patient with an axial-flow left-ventricular assist device. Saur J, Trinkmann F, Hoffmann U, Kaden JJ, Haghi D. PMID: Sulfur Hexafluoride

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  • Physical properties and virial coefficients of sulfur

    Determination of the coexistence curve of sulfur hexafluoride from isochoric intercepts. Fluid Phase Equilibria 1989, 47 (1) , 67-75. DOI: 10.1016/0378-3812(89)80050-0. H. H usler, K. Kerl. Mean polarizabilities and second and third virial coefficients of the gases C2H4, C2H6, and SF6.Cited by: 79

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  • ACP - The increasing atmospheric burden of the greenhouse

    Sulfur hexafluoride in the electrical power industry is primarily used in high-voltage gas-insulated switchgear (GIS), Vollmer, M. K. and Weiss, R. F.: Simultaneous determination of sulfur hexafluoride and three chlorofluorocarbons in water and air, Mar. Chem., 78, 137–148, 2002.

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  • Determination of body volume in normal adults and in

    This study sought to establish body volume measurement by the sulfur hexafluoride (SF 6) dilution technique and to assess the body composition of healthy subjects and patients with the complications of cerebral palsy and mental retardation.Sixty‐six healthy males and females ranging in age from 18 to 41 years and 10 patients with the complications ranging in age from 23 to 34 yearsCited by: 5

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  • Determination of body volume in normal adults and in

    Read Determination of body volume in normal adults and in patients with cerebral palsy by the sulfur hexafluoride (SF 6 ) dilution technique, American Journal of Human Biology on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at

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  • US4358111A - Pressurized, non-refillable recreation ball

    A pressurized, non-refillable recreation ball inflated with a mixture of sulfur hexafluoride and air for improved shelf life and pressure retention is obtained by filling the ball with sulfur hexafluoride in a range of 65% to 75% by volume and 35% to 25% by volume of air. Preferably, the sulfur hexafluoride is present in an amount of 71% by volume.Cited by: 6

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  • The triple point of sulfur hexafluoride - IOPscience

    Mar 31, 2016The complete uncertainty budget for the presently reported sulfur hexafluoride triple point temperature determination on the ITS-90 is summarized in table 2, showing that the combined standard uncertainty for the assigned triple point temperature of 223.555 23 K on the full ITS-90 e-H 2 –TPW subrange is 0.49 mK.Cited by: 12

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  • Standard Test Method for Acidity of Sulfur Hexafluoride

    1. Scope. 1.1 This test method covers the determination of the acidic fluorides of sulfur hexafluoride (SF 6).. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use.It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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  • Anthropogenic sources of halocarbons, sulfur hexafluoride,

    oxide), and SF 6 (sulfur hexafluoride). We utilize four methods to compute the relative sources, each of which handles serial corre- lation in the time series in a different way. We find that several of the compounds (CH4, CO, CC12F2, CC13F , CH3CC13, C2C14, and SF6) are nearly always well correlated in pollution plumes,

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  • Determination of impurities in germanium tetrafluoride by

    Oct 23, 2010Krylov, V.A. and Sorochkina, T.G., Gas-Chromatographic Determination of C 1-C 4 Hydrocarbons and Sulfur Hexafluoride in High-Purity Germanium Tetrafluoride of Natural and Isotopically Enriched Composition, Zavod. Lab.,

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  • Non-Semiconductor and Non-Utility Applications

    Dec 29, 2009RULEMAKING TO CONSIDER ADOPTING A REGULATION TO REDUCE SULFUR HEXAFLUORIDE EMISSIONS IN NON 2009. OAL has until December 29, 2009 to make a determination. Executive Order R-09-008 (PDF- 8K 1- Blank Surveys of Users of Sulfur Hexafluoride 2- Blank Surveys of Manufactures and Distributors of Sulfux Hexafluoride Appendix C:

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  • Standard Test Method for Acidity of Sulfur Hexafluoride

    1.1 This test method covers the determination of the acidic fluorides of sulfur hexafluoride (SF 6 ). 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use.

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  • Farfield Tracing of a Point Source Discharge Plume in the

    The present effort pioneers the application of sulfur hexafluoride (SF 6) for the determination of pathways and dilution at great distances from the source of discharge. By injectionofSF 6 intothesourcewater,itcanbeaclearmarker of this discharge in the coastal ocean and provide reliable and attributable dilution estimates in the farfield. These

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  • NIOSHTIC-2 Publications Search - 00134266 - Sulfur

    An analytical method was developed for the determination of airborne concentrations of sulfur-hexafluoride (2551624). A known volume of air was collected in a five layer gas sampling bag using a personal pump. The sample was then analyzed using a gas chromatograph with a thermal conductivity detector. The method was validated by the analysis of 18 samples representing 50, 100, and 200

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  • Sulfur hexafluoride - NIST

    IUPAC Standard InChIKey: SFZCNBIFKDRMGX-UHFFFAOYSA-N CAS Registry Number: 2551-62-4 Chemical structure: This structure is also available as a 2d Mol file; Other names: Sulfur fluoride; OC-6-11; Elegas; SF6; Hexafluorure de soufre; UN 1080; Esaflon; sulphur hexafluoride Permanent link for this species. Use this link for bookmarking this species for future reference.

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  • BACKGROUND DOCUMENT EMISSION FACTORS

    Fans inside the ECC ensure even distribution of the sulfur hexafluoride (SF6) tracer gas and weapon emission products. A series of 12 ports are located along the sides and top of the chamber to

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