Fig. 1. Characteristic spectrum of air and straw smoke at bands of 240~500 nm

Fig. 2. Characteristic spectrum of air and straw smoke at bands of 460~700 nm

Fig. 3. Characteristic spectrum of smoke straw combustion at band of 400~890 nm

Fig. 4. The simulation diagram of CN molecular spectrum and the experimental CN molecular spectrum diagram of sample combustion
(a): LIBS of breath; (b): LIBS of smoke; (c): LIFBASE fitting

Fig. 5. LIBS spectrum of smoke from original straw and the straw containing Pb
(a): LIBS of smoke; (b): LIBS of smoke with lowe concentration of Pb; (c): LIBS of smoke with high concentration of Pb