Abstract
The precise method for determination of small amounts of chlorobenzenes (monochlorobenzene and dichlorobenzenes) in air was studied and applied to the survey in wardrobes, indoors and in atmosphere. Air sampling was accomplished by adsorbing the pollutants in the collection tube packed with TENAX® GC. The pollutants collected were desorbed from the tube by heating the tube at 220°C and injected with carrier gas into a gas chromatograph with a mass spectrometer (GC/MS). In the survey of an urban area (Kawasaki city) and rural area (Tanzawa Mountains), a concentration of para-dichlorobenzene (PDCB) which has been used as a moth repellent and deodorant was much higher than that of any other chlorobenzenes outdoors and indoors.
The concentrations of PDCB were as follows: 13 to 25 ppt in the rural area; 0.16 to 0.95 ppb in the urban area; 0. 044 to 2.0 ppm indoors; 0.2 to 88 ppm in the wardrobes. The concentrations of ortho-dichlorobenzene were 2 to 4 and 2 to 52 ppt in the rural and urban area, respectively. The concentrations of meta-dichlorobenzene were less than 1 ppt in both the rural and urban area. The concentrations of monochlorobenzene were 3 to 4 and 6 to 36ppt in the rural and urban area, respectively.
