Determination of Volatile Organic Compounds in Indoor Air Samples by Thermal Desorption-GC/MS System after Collections by both Air Toxics Tube-Pump Method and Carbopack B Tube-Diffusion Method.

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Twenty seven volatile organic compounds in indoor air in a newly constructed residential multi-family building before occupied were measured by Air Toxics sorbent tubes - thermal desorption - GC/MS system. All the volatile organic compounds were detected except for chloroform. Detection limit of chloroform was 0.3μg/m3. Concentration of volatile organic compounds ranged from 1.2μg/m3 for 1, 1, 1-trichloroethane to 1200μg/m3 for toluene. We also investigated the usefulness of diffusive sampling tube packed with Carbopack B for the determination of volatile organic compounds in indoor air. Diffusive uptake rates were calculated to be 0.36±0.06ml/min for hexane, 0.267±0.04ml/min for ethylbenzene, 0.177±0.03ml/min for nonane, 0.137±0.02ml/min for dichloromethane and 0.24±0.05ml /min for methyl iso-butyl ketone. Relative standard deviations of diffusive uptake rates for heptane, benzene and trichloroethylene were under 24%. These results suggested that Carbopack B diffusive sampler was useful for the determination of volatile organic compounds in indoor air samples.
日本環境化学会の論文