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The lead content in the flameless combustion flue gas for three types of cable was measured using inductively coupled plasma mass spectrometer (ICP-MS) under 5 different temperatures ranging 300~700°C, and the non-carcinogenic risk analysis model was employed to estimate human health risk under different physical activities. Experimental results showed that the lead concentration sorted order for three kinds of cable flue gas is ZR-YJV>YJV> ZR-RVV. With the rise in temperature the lead content in the cable smoke increases, and the lead content at 600~700°C is higher than that of the national standard. Non-carcinogenic risk analysis demonstrated that at 600~700°C the Rf values of these three kinds of cables are at 1~100 level. But during extremely heavy physical activities, the Rf values of YJV and ZR-YJV reached 106.05 and 120.49 levels at 700°C respectively, which are 100 times more than the risk limit and have a strong non-carcinogenic risk. Introduction Using of high-dose stabilize is important for static stability of cable. Lead salts are widely used as compound lead stabilizers in PVC cable materials due to their good thermal, light stability and heat resistance, with the amount added at 4~7 PHR. PVC cable industry has become a major disaster area of potential heavy metal pollution. The release of a large amount of lead contained in the smoke gas coming from cable combustion may cause harm to people, Excessive levels of lead in the air can cause headaches, dizziness, insomnia, forgetfulness, confusion, joint pain, and stones and other symptoms, Especially for firefighters. Concentrations of lead in Three Cable Smokes at Different Temperatures were detected by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). At the same time, its non-carcinogenic risk was analyzed according to the American EPA 200.8 standard. Materials and Methods Materials and Instruments 4mm 2 flame-retardant XLPE insulated PVC sheathed cable (hereinafter referred to as ZR-YJV cable), 4mm 2 flame-retardant PVC insulated PVC protection A flexible cable (hereinafter referred to as ZR-RVV cable) and a 4mm 2 XLPE insulated PVC sheathed cable (hereinafter referred to as YJV cable). Nitric acid (purity of pure grade, Sinopharm Chemical Reagent Co.Ltd.); lead standard solution (Beijing Nonferrous Metals Research Institute). Thermo Fisher X series 2 inductively coupled plasma mass spectrometer, GGX-900 zeeman atomic absorption spectrophotometer, CPA225D electronic balance, ETT-2000 double air path atmospheric sampler. Material flameless combustion production platform. Ultra-fine glass fiber filter membrane (φ25mm*0.22μm). 257 Methods Lead Standard Curves According to the American EPA200.8 standard, the lead in the sample was tested by ICP-MS. The standard solution of heavy metal lead was prepared into a standard reserve solution of 10 μg/mL using 5% nitric acid. Then, after multiple dilutions and constant volume, 10 μg/L, 20 μg/L, 30 μg/L, 40 μg/L, 50 μg/L standard solution were obtained. The response value CPS (the ratio of the concentration of the liquid to be measured to the signal output by the instrument) is the ordinate and the concentration is the abscissa. The standard curve is drawn and the regression equation is obtained by statistical analysis (the correlation coefficient should be above 0.99). Sample Collection and Processing In the same smoke generation device and conditions as the online analysis of smoke, the sample containing the ultra-fine glass fiber filter (baked at 450° C for 30 min) is clamped to the flue gas discharge port. The collects of flue gas samples are collected for 20 minutes at a flow rate of 3 L/ min using atmospheric sampler. Blank sample is taken outside the indoor at the same time. The sample box is covered immediately and stored for testing. Membrane samples will cut up put in centrifuge tube, Immerse the filter with 10.0 ml of 5% HNO3 solution. After 70°C ultrasonic extraction, cooling and centrifugation, the supernatant is injected for detection. ICP-MS Working Conditions Power: 1200W; atomization gas flow rate: 1.0L/min; auxiliary gas flow rate: 0.92 L/min; plasma gas flow rate:14.5L/min; reaction gas (NH3) flow rate: 0.6 mL/min; reaction gas (O2) Flow rate: 1.0 mL/min; platinum sampling cone (1.1 mm)/platinum intercept cone (0.9 mm); resolution (10% peak height): 0.6 ~ 0.7 amu; detector mode: pulse/simulation; integration time: 100 ms; Injection speed: 1.0 mL/min; repeated measurement times: 3 times; analysis time: 5 min. Calculation of Lead Concentration Average concentration of lead in smoke:

ICP-MS Detection and Non-carcinogenic Risk Analysis of Lead in Cable Flue Gas