Infrared absorption cross sections for air-broadened 1,1-dichloro-1-fluoroethane (HCFC-141b)
نویسندگان
چکیده
منابع مشابه
Metabolism of 1,1-dichloro-1-fluoroethane (HCFC-141b) in human volunteers.
Human subjects were exposed by inhalation to 250, 500, and 1000 ppm 1,1-dichloro-1-fluoroethane (HCFC-141b) for 4 hr, and urine samples were collected from 0-4, 4-12, and 12-24 hr for metabolite analysis. 19F nuclear magnetic resonance spectroscopic analysis of urine samples from exposed subjects showed that 2,2-dichloro-2-fluoroethyl glucuronide and dichlorofluoroacetic acid were the major and...
متن کاملMeasurements of the infrared absorption cross-sections of HCFC-141b (CH3CFCl2)
Detection of atmospheric trace gases by optical remote sensing techniques relies on the availability of molecular absorption spectra over a range of relevant temperatures. Absorption cross-sections of a pure vapour of the hydrochlorofluorocarbon HCFC-141b are reported at a resolution of 0.02 cm 1 for a range of temperatures between 223 and 283 K and a spectral range of 570–3100 cm . The integra...
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[1] The CalNex 2010 (California Research at the Nexus of Air Quality and Climate Change) study was designed to evaluate the chemical composition of air masses over key source regions in California. During May to June 2010, air samples were collected on board a National Oceanic and Atmospheric Administration (NOAA) WP-3D aircraft over the South Coast Air Basin of California (SoCAB) and the Centr...
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Chlorofluorocarbons (CFCs) are stable in the atmosphere and may reach the stratosphere. They are cleaved by UV-radiation in the stratosphere to yield chlorine radicals, which are thought to interfere with the catalytic cycle of ozone formation and destruction and deplete stratospheric ozone concentrations. Due to potential adverse health effects of ozone depletion, chlorofluorocarbon replacemen...
متن کاملUsing hydrofluoroether solvents to replace HCFC-141b, Part II.
The use of hydrochlorofluocarbon (HFC) solvents is banned from the end of 2001. Part of this article assessed the merits of using hydrofluoroethers as replacement solvents. Alternatives to HFCs are more expensive. Part II looks at how to reduce the cost of conversion.
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ژورنال
عنوان ژورنال: Journal of Quantitative Spectroscopy and Radiative Transfer
سال: 2019
ISSN: 0022-4073
DOI: 10.1016/j.jqsrt.2019.04.041