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An evaluation of the face mask system based on short-term measurements compared with the sulfur hexafluoride (SF 6 ) tracer, and respiration chamber techniques for measuring CH 4 emissions

Environmental ChemistryAir SamplingEngineeringChemical EmissionEnvironmental EngineeringRespiration Chamber TechniquesAir QualitySulfur HexafluorideIndoor Air QualityAir PollutionFace Mask SystemInhalation Toxicology