title: [Determination of volatile organic compounds in air by portable gas chromatography-mass spectroscopy].
abstract: Objective:To investigate the method of portable gas chromatography-mass spectroscopy (GC-MS) for the determination of common volatile organic compounds in air.Methods:The static volumetric method was used, with highly purified nitrogen gas as the diluents gas, to prepare the mixed standard gas of common volatile organic compounds with various mass concentrations. A portable GC-MS handheld probe was used for sampling and measurement, retention time and characteristic ion were used for qualitative analysis, and the full-scan mode was used for quantitative analysis.Results:The correlation coefficient of 12 volatile organic compounds determined by this method was higher than 0.999. The minimum detection mass concentration was 0.02~0.12 mg/m3, and the minimum quantitative mass concentration was 0.07~0.40 mg/m3. The relative standard deviation of precision was 4.10%~12.50%; the relative deviation of acetone, benzene, methylbenzene, and dimethylbenzene was-13.56% , 9.03% , -10.82% , and 8.67% , respectively.Conclusion:Portable GC-MS method can be used for the qualitative analysis and quantification of volatile organic compounds in occupational hazard factors and provide technical supports for identification of occupational hazard factors.
authors.affiliation: Guangdong Province Hospital for Occupational Disease Prevention and Treatment, Guangzhou 510300, China.
authors.forename: W F
authors.initials: WF
authors.lastname: Rong
authors.forename: J H
authors.initials: JH
authors.lastname: He
authors.forename: R B
authors.initials: RB
authors.lastname: Meng
authors.forename: W J
authors.initials: WJ
authors.lastname: Ling
authors.forename: J W
authors.initials: JW
authors.lastname: Hu
authors.forename: J J
authors.initials: JJ
authors.lastname: Qiu
authors.forename: M
authors.initials: M
authors.lastname: Dong
mesh_terms: D001554:Benzene; D008401:Gas Chromatography-Mass Spectrometry; D014050:Toluene; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D055549:Volatile Organic Compounds; D014050:Toluene; D001554:Benzene