The role of human activities on number concentration and size distribution of particles in indoor air

Particle number concentrations and size distributions have been monitored in the kitchen during candle burning and smoking a cigarette with a Scanning Mobility Particle Sizer. Burning a candle produces particles in size range of 6–15 nm, whereas during smoking a cigarette, larger particles are formed in size range of 40–150 nm. Total concentration of particles increased up to 1,341,000 and 423,000 cm–3 during burning a candle and smoking a cigarette, respectively.