title: [Emission characteristics and safety evaluation of volatile organic compounds in manufacturing processes of automotive coatings].
abstract: Emission characteristics of volatile organic compounds (VOCs) were investigated in an automotive coating manufacturing enterprise. Air samples were taken from eight different manufacturing areas in three workshops, and the species of VOCs and their concentrations were measured by gas chromatography-mass spectrometry (GC-MS). Safety evaluation was also conducted by comparing the concentration of VOCs with the permissible concentration-short term exposure limit (PC-STEL) regulated by the Ministry of Health. The results showed that fifteen VOCs were detected in the indoor air of the automotive coatings workshop, including benzene, toluene, ethylbenzene, xylene, ethyl acetate, butyl acetate, methyl isobutyl ketone, propylene glycol monomethyl ether acetate, trimethylbenzene and ethylene glycol monobutyl ether, Their concentrations widely ranged from 0.51 to 593.14 mg x m(-3). The concentrations of TVOCs were significantly different among different manufacturing processes. Even in the same manufacturing process, the concentrations of each component measured at different times were also greatly different. The predominant VOCs of indoor air in the workshop were identified to be ethylbenzene and butyl acetate. The concentrations of most VOCs exceeded the occupational exposure limits, so the corresponding control measures should be taken to protect the health of the workers.
authors.forename: Pei-Yuan
authors.initials: PY
authors.lastname: Zeng
authors.forename: Jian-Jun
authors.initials: JJ
authors.lastname: Li
authors.forename: Dong-Qi
authors.initials: DQ
authors.lastname: Liao
authors.forename: Xiang
authors.initials: X
authors.lastname: Tu
authors.forename: Mei-Ying
authors.initials: MY
authors.lastname: Xu
authors.forename: Guo-Ping
authors.initials: GP
authors.lastname: Sun
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001336:Automobiles; D001554:Benzene / Q000032:analysis; D001555:Benzene Derivatives / Q000032:analysis; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D066192:Manufacturing Industry; D016273:Occupational Exposure; D012449:Safety; D020711:Threshold Limit Values; D014050:Toluene / Q000032:analysis; D055549:Volatile Organic Compounds / Q000032:analysis*; D014992:Xylenes / Q000032:analysis
chemical_list: D000393:Air Pollutants; D001555:Benzene Derivatives; D055549:Volatile Organic Compounds; D014992:Xylenes; D014050:Toluene; D001554:Benzene; C004912:ethylbenzene