INTRODUCTION
(Determinations -- Smoke formations)
- Over 4000 different compounds have benn identified in tobacco smoke
- Tobacco smoke has been separated into gas and particulate phase.
- The gas phase some components: carbon monoxide, carbon dioxide, hydrogen cyanide, volatile sulfur compound...
- The particulate phase principal constituents: water, nicotin, benzenes, polynuclear aromatic hydrocarbons, metallic constituents, radioactive compounds...
- Tobacco smoke can be divided into mainstream and sidestream smoke too.
- Mainstream smoke is smoke that the smoker inhales directly during puffing.
- Sidestream smoke is smoke emitted from a smoldering cigarette in the ambient air.
FACT: Both mainstream and sidestream are generated from the tip of burning tobacco product. The compositions of two fractions are similar.
NOTE:
- Sidestream smoke has higher concentrations of some of irritating and hazardous substances than does mainstream smoke (that smoke inhaled by the smoker).
- Environmental tobacco smoke results from the combination of sidestream smoke and the fraction of exhaled mainstream smoke not retained by the smoker.
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