title: Air sampling and analysis with microcolumns of silica gel.
mesh_terms: D000397:Air Pollution; D002849:Chromatography, Gas; D005782:Gels; D006838:Hydrocarbons / Q000032:analysis*; D009787:Occupational Medicine / Q000295:instrumentation*; D012822:Silicon Dioxide; D013053:Spectrophotometry
chemical_list: D005782:Gels; D006838:Hydrocarbons; D012822:Silicon Dioxide