title: Calculation of vapor penetration in charcoal sampling tubes.
abstract: Assuming that the back section of a charcoal air sampling tube has half the retentivity of the front, an equation was derived that estimates conservatively the loss when some contaminant is found in the back section.
mesh_terms: D000388:Air / Q000032:analysis*; D002606:Charcoal; D008722:Methods; D008956:Models, Chemical
chemical_list: D002606:Charcoal