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Diffusion samplers

Various types of detector tubes have been devised. The NIOSH standard number S-311 employs a tube filled with 420—840 p.m (20/40 mesh) activated charcoal. A known volume of air is passed through the tube by either a handheld or vacuum pump. Carbon disulfide is used as the desorbing solvent and the solution is then analyzed by gc using a flame-ionization detector (88). Other adsorbents such as siUca gel and desorbents such as acetone have been employed. Passive (diffuse samplers) have also been developed. Passive samplers are useful for determining the time-weighted average (TWA) concentration of benzene vapor (89). Passive dosimeters allow permeation or diffusion-controlled mass transport across a membrane or adsorbent bed, ie, activated charcoal. The activated charcoal is removed, extracted with solvent, and analyzed by gc. Passive dosimeters with instant readout capabiUty have also been devised (85). [Pg.46]

Lab method using porous polymer adsorption tube and thermal desorption with gas chromatography Lab method using porous polymer diffusive samplers with thermal desorption and gas chromatography Lab method using pumped acid-coated filters, desorption and liquid chromatography... [Pg.360]

Eormaldehyde in air Lab method using diffusive sampler, solvent desorption and high performance liquid chromatography 78... [Pg.361]

Mercury vapour in air Diffusive samplers with qualitative onsite colorimetric analysis and quantitative cold vapour atomic absorption spectrometry in the laboratory 59... [Pg.362]

Lab method using porous polymer diffusive samplers, thermal desorption and gas chromatography 43... [Pg.363]

Lab method using charcoal diffusive samplers, solvent desorption and gas chromatography (using Drager ORSA monitor) 64... [Pg.363]

Protocol for assessing the performance of a diffusive sampler Chlonnated hydrocarbon solvent vapours m air Beryllium and inorganic compounds of beryllium m air... [Pg.581]

Benzene m air (porous polymer diffusion samplers, thermal desoiption and gas chromatography) Quartz in respirable airborne dusts (X-ray diffraction)... [Pg.581]

MDHS27 Protocol for assessing the performance of a diffusive sampler. [Pg.370]

MDHS44 Styrene in air (charcoal diffusive samplers, solvent desorpton and gas... [Pg.371]

See other pages where Diffusion samplers is mentioned: [Pg.357]    [Pg.359]    [Pg.360]    [Pg.361]    [Pg.363]    [Pg.364]    [Pg.364]    [Pg.581]    [Pg.371]    [Pg.357]    [Pg.359]    [Pg.360]    [Pg.361]    [Pg.363]    [Pg.364]    [Pg.364]    [Pg.581]   
See also in sourсe #XX -- [ Pg.209 , Pg.210 , Pg.211 , Pg.212 , Pg.213 , Pg.214 , Pg.215 , Pg.216 , Pg.217 , Pg.218 , Pg.219 , Pg.220 ]



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Diffusion-based samplers

Diffusion-controlled passive samplers

Diffusive samplers

Diffusive samplers area monitoring

Diffusive samplers diffusion coefficient

Diffusive samplers mass transfer

Diffusive samplers personal exposure

Diffusive samplers workplace monitoring

Radial diffusive samplers

Solvent from diffusive samplers

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