title: Suspect contamination of charcoal tubes linked to coated paper photocopies.
mesh_terms: D002606:Charcoal; D002849:Chromatography, Gas; D003308:Copying Processes; D004785:Environmental Pollutants / Q000032:analysis*; D008722:Methods
chemical_list: D004785:Environmental Pollutants; D002606:Charcoal