title: One-way leak in mass spectrometer sampling system.
authors: R F
authors: RF
authors: Koebert
authors: R
authors: R
authors: Munster
mesh_terms: D004868:Equipment Failure; D006801:Humans; D013058:Mass Spectrometry / Q000295:instrumentation*; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D012119:Respiration