Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) in indoor air after cigarette smoking were determined by high resolution gas chromatography/high resolution mass spectrometry. Concentrations of total PCDDs and PCDFs in control indoor air were 4.65 and 6.08pg/m3, respectively. Concentration of PCDDs and PCDFs in indoor air where 20 cigarette were smoked for 7 hour were 10-30% higher than those in control indoor air. Cigarette were smoked at a rate of l cigarette/min by using a cigarette-smoke generator. After 20 cigarette were smoked, concentrations of PCDDs and PCDFs in the indoor air were 8.6 and 6.8pg/m3, respectively. This level was 1.4 times higher than that in the control indoor air. After 100 cigarette were smoked, concentrations of PCDDs and PCDFs in the indoor air were 13.6 and 8.3 pg/m3, respectively. This level was 2 times higher than that in the control indoor air. The increase of daily intake of PCDDs and PCDFs by passive smoking was estimated 0.7pg/person/day as2, 3, 7, 8-TCDD equivalent, which is around 250 time less than daily intake of total PCDDs and PCDFs as 2, 3, 7, 8-TCDD equivalent.
