carbosieve adsorbents

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Showing 1-21 of 21 results for "carbosieve adsorbents" within Papers

Influence of relative humidity and ozone on the sampling of volatile organic compounds on carbotrap/carbosieve adsorbents.

Fabienne Palluau et al.

Environmental monitoring and assessment, 127(1-3), 177-187 (2006-08-10)

By using a dynamic dilution system, the atmospheric measurement of 11 selected toxics VOCs (ethylene, acetylene, propene, 1-butene, 1,3-butadiene, 1-pentene, 1-hexene, benzene, toluene, ethylbenzene, m+p-xylene) from the list WHO of 1996 and TO-14 method of US EPA by preconcentration by

Water adsorption capacity of the solid adsorbents Tenax TA, Tenax GR, Carbotrap, Carbotrap C, Carbosieve SIII, and Carboxen 569 and water management techniques for the atmospheric sampling of volatile organic trace gases.

Helmig, Detlev, and Lee Vierling.

Analytical Chemistry, 67, 4380-4386 (1995)

Analytical Chemistry, 67(23), 4380-4386 (1995)

Detlev H et al.

Analytical Chemistry, 67 (23), 4380-4386 (1995)

Evaluation of sorbent materials for the sampling and analysis of phosphine, sulfuryl fluoride and methyl bromide in air.

R Magnusson et al.

Journal of chromatography. A, 1375, 17-26 (2014-12-17)

Phosphine (PH3), sulfuryl fluoride (SO2F2) and methyl bromide (CH3Br) are highly toxic chemical substances commonly used for fumigation, i.e., pest control with gaseous pesticides. Residues of fumigation agents constitute a health risk for workers affected, and therefore accurate methods for

Application of thermal desorption to the development of a gas chromatographic/mass spectrometric method for the determination of toluene, chlorinated aromatic hydrocarbons, and 2,3,7,8-tetrachlorodibenzo-p-dioxin in combustion emissions.

John D Donaldson et al.

Journal of AOAC International, 86(1), 39-43 (2003-02-28)

A fast and accurate analytical method, which uses commercially available adsorbents (Tenax TA, Carbotrap B and C, and Carbosieve S-III), was developed for the sampling and determination of aromatic hydrocarbons, chloroaromatic compounds, and 2,3,7,8-tetrachlorodibenzo-p-dioxin. The breakthrough volume data show that

Comparison of nutshell granular activated carbons to commercial adsorbents for the purge-and-trap gas chromatographic analysis of volatile organic compounds.

L H Wartelle et al.

Journal of chromatography. A, 879(2), 169-175 (2000-07-13)

Granular activated carbons (GACs) made from agricultural by-products were investigated as adsorbents for short path thermal desorption gas chromatographic analysis of selected polar and nonpolar organic compounds. GACs made from macadamia nut, black walnut and hazelnut shells were compared to

Determination of volatile and semivolatile mutagens in air using solid absorbents and supercritical fluid extraction.

J M Wong et al.

Analytical chemistry, 63(15), 1644-1650 (1991-08-01)

Volatile toxicants may be present in emissions from mobile and stationary sources as well as in ambient air. Methods for collecting and concentrating volatiles from air samples have been developed. Solid-phase adsorbents were compared in their trapping efficiencies for dichloromethane

Evaluation of solid adsorbent materials for cryogen-free trapping-gas chromatographic analysis of atmospheric C2-C6 non-methane hydrocarbons.

Jan Pollmann et al.

Journal of chromatography. A, 1134(1-2), 1-15 (2006-10-03)

Nine commercial solid adsorbent materials (in order of decreasing surface area: Carboxen 1000, Carbosieve S III, molecular sieve 5A, molecular sieve 4A, silica gel, Carboxen 563, activated alumina, Carbotrap and Carboxen 1016) were investigated for their ability to trap and

Sensitive indoor air monitoring of monoterpenes using different adsorbents and thermal desorption gas chromatography with mass-selective detection.

Juliane Hollender et al.

Journal of chromatography. A, 962(1-2), 175-181 (2002-08-30)

A simple method using active trapping on adsorbents and thermal desorption followed by GC-MS analysis was developed for the indoor air monitoring of monoterpenes. The study was carried out using a dynamically generated atmosphere consisting of 11 monoterpenes: camphene, camphor

Development and application of a thermal desorption method for the analysis of polar volatile organic compounds in workplace air.

R A Hallama et al.

Journal of chromatography. A, 809(1-2), 47-63 (1998-07-25)

The application of a newly developed thermal desorption method for the analysis of workplace air to the analysis of polar compounds is reported. The method was validated for both pumped and diffusive sampling of test gases containing polar volatile organic

Performance catalytic ozonation over the carbosieve in the removal of toluene from waste air stream.

Mohammad Reza Samarghandi et al.

Journal of research in health sciences, 14(3), 227-232 (2014-09-12)

Toluene is a volatile organic compound, one of 189 hazardous air pollutants (HAPs) and the most important pollutant found in most industries and indoor environments; owing to its adverse health, toluene must be treated before being released into the environment.

Evaluation of adsorbents for volatile methyl siloxanes sampling based on the determination of their breakthrough volume.

L Lamaa et al.

Talanta, 115, 881-886 (2013-09-24)

Volatile methyl siloxanes (VMS) have been detected in many different atmospheres such as biogas, sewage sludge, landfill gas, gasoline and ambient air. In these different atmospheres, their presence can involve several contamination problems and negative effects in industrial processes, their

Adsorption energies for a nanoporous carbon from gas-solid chromatography and molecular mechanics.

Thomas R Rybolt et al.

Journal of colloid and interface science, 296(1), 41-50 (2005-09-20)

Gas-solid chromatography was used to obtain second gas-solid virial coefficients, B2s, in the temperature range 342-613 K for methane, ethane, propane, butane, 2-methylpropane, chloromethane, chlorodifluoromethane, dichloromethane, and dichlorodifluoromethane. The adsorbent used was Carbosieve S-III (Supelco), a carbon powder with fairly

Efficient adsorption of super greenhouse gas (tetrafluoromethane) in carbon nanotubes.

Piotr Kowalczyk et al.

Environmental science & technology, 42(8), 2931-2936 (2008-05-24)

Light membranes composed of single-walled carbon nanotubes (SWNTs) can serve as efficient nanoscale vessels for encapsulation of tetrafluoromethane at 300 K and operating external pressure of 1 bar. We use grand canonical Monte Carlo simulation for modeling of CF4 encapsulation

Process sampling module coupled with purge and trap-GC-FID for in situ auto-monitoring of volatile organic compounds in wastewater.

Hsin-Wang Liu et al.

Talanta, 80(2), 903-908 (2009-10-20)

An automatic sampling device, i.e., process sampling module (PSM), connected with a purge and trap-GC-FID system has been developed for real-time monitoring of VOCs in wastewater. The system was designed to simultaneously monitor 17 compounds, including one polar compound, i.e.

Low-flow active and passive sampling of VOCs using thermal desorption tubes: theory and application at an offset printing facility.

Stuart Batterman et al.

Journal of environmental monitoring : JEM, 4(3), 361-370 (2002-07-04)

While air sampling techniques using adsorbent-based collection, thermal desorption and chromatographic analysis have found a niche in ambient air sampling, occupational applications have been more limited. This paper evaluates the use of thermal desorption techniques for low flow active and

Ambient level volatile organic compound (VOC) monitoring using solid adsorbents--recent US EPA studies.

William A McClenny et al.

Journal of environmental monitoring : JEM, 4(5), 695-705 (2002-10-29)

Ambient air spiked with 1-10 ppbv concentrations of 41 toxic volatile organic compounds (VOCs) listed in US Environmental Protection Agency (EPA) Compendium Method TO-14A was monitored using solid sorbents for sample collection and a Varian Saturn 2000 ion trap mass

Using mesoporous silica MCM-41 for in-line enrichment of atmospheric volatile organic compounds.

Tung-Min Wu et al.

Journal of chromatography. A, 1105(1-2), 168-175 (2005-10-08)

A mesoporous silica MCM-41 with pore size of 29A was synthesized and assessed for its applicability as a sorbent for in-line trapping of volatile organic compounds (VOCs) from air samples. Several commercially available microporous carbon molecular sieves, i.e., Carbosieve SIII

Polynuclear aromatic hydrocarbon and particulate emissions from two-stage combustion of polystyrene: the effects of the secondary furnace (afterburner) temperature and soot filtration.

Jun Wang et al.

Environmental science & technology, 36(4), 797-808 (2002-03-07)

Laboratory experiments were conducted in a two-stage horizontal muffle furnace in order to monitor emissions from batch combustion of polystyrene (PS) and identify conditions that minimize them. PS is a dominant component of municipal and hospital waste streams. Bench-scale combustion

Measurement and modeling of exposure to selected air toxics for health effects studies and verification by biomarkers.

Roy M Harrison et al.

Research report (Health Effects Institute), (143), 3-96 (2009-12-17)

The overall aim of our investigation was to quantify the magnitude and range of individual personal exposures to a variety of air toxics and to develop models for exposure prediction on the basis of time-activity diaries. The specific research goals

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