title: [The trial of simple gas analysis of tobacco smoke that can be used for medical education].
abstract: OBJECTIVE
  The purpose of this study was to check a simple sampling and easy gas analysis of tobacco smoke for effective tobacco intervention in medical education.
  
  
  METHODS
  The mainstream of tobacco smoke was sampled by a syringe (50 ml) at five, ten and twenty seconds. The extracted mainstream was moved to a commercial PET bottle (2000 ml), and measured with gas detector tubes. The sidestream, which rises from the tip of the cigarette, was collected into a commercial PET bottle for a duration of 30 or 60 seconds. Formaldehyde, acetaldehyde, ammonia, hydrogen cyanide, and nitrogen oxides (NO, NO2) in the tobacco smoke were measured. Then, these gasses in the tobacco smoke of four brands of cigarettes were compared. This trial was conducted in third-year medical students, and the changes in attitudes to smokers and tobacco itself were investigated.
  
  
  RESULTS
  The method of sampling 50 ml for 5 seconds produced the highest concentration of each gas in the mainstream. The gas concentration in the sidestream increased as the sampling time increased. The gas concentration in mainstream of "Lucia" was the highest of the used four brands, and the gas concentrations in the sidestream of "Mild Seven Prime" were higher than those of the other brands. Many medical students obtained knowledge about the toxicity of smoking by this experiment study.
  
  
  CONCLUSIONS
  We studied a simple sampling method of tobacco smoke, and gas analysis with gas detector tubes. This method is recommended for tobacco education and intervention in medical education.
authors.affiliation: Department of Hygiene and Public Health, Nippon Medical School, Tokyo, Japan. masao-k@nms.ac.jp
authors.forename: Masao
authors.initials: M
authors.lastname: Katsumata
authors.forename: Kimiko
authors.initials: K
authors.lastname: Hirata
authors.forename: Ari
authors.initials: A
authors.lastname: Nakadai
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Inagaki
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Kawada
mesh_terms: D000079:Acetaldehyde / Q000032:analysis; D000641:Ammonia / Q000032:analysis; D004504:Education, Medical, Undergraduate; D005557:Formaldehyde / Q000032:analysis; D006856:Hydrogen Cyanide / Q000032:analysis; D009589:Nitrogen Oxides / Q000032:analysis; D014028:Tobacco Smoke Pollution / Q000032:analysis*
chemical_list: D009589:Nitrogen Oxides; D014028:Tobacco Smoke Pollution; D005557:Formaldehyde; D006856:Hydrogen Cyanide; D000641:Ammonia; D000079:Acetaldehyde