title: [Determination of free silica by visible absorption spectrophotometry].
authors.affiliation: National Institute of Industrial Health, Kawasaki, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Ojima
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D004391:Dust / Q000032:analysis*; D012822:Silicon Dioxide / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods*
chemical_list: D000395:Air Pollutants, Occupational; D004391:Dust; D012822:Silicon Dioxide