title: An inexpensive gas chromatograph for breath hydrogen analysis.
mesh_terms: D001944:Breath Tests / Q000295:instrumentation*; D002849:Chromatography, Gas / Q000295:instrumentation; D006801:Humans; D006859:Hydrogen / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis; D010100:Oxygen / Q000032:analysis
chemical_list: D006859:Hydrogen; D009584:Nitrogen; D010100:Oxygen