抄録
A method for the simultaneous determination of 1, 1, 1-trichloroethane (TCE) and it's stabilizer 1, 4-dioxane (DO), 1, 2-epoxybutane (EB), nitromethane (NM), nitroethane (NE) in household aerosol products by gas chromatography (GC) was developed. In this dryspace method, an aerosol product sample was propelled into 50 ml beaker. The propelled solution (3-4 ml) was weighed in a 10 ml test tube, and the same weight of 1, 2-dichloropropane (DCP) as an internal standard was added. Sixteen μl of this sample solution was loaded to a pre-cooled syringe (25 μl), and was injected to a sealed vial (125 ml). The vial was tapped slightly for the wide spreading of the solution, and the solution was ascertained to evaporate to dryness within 3 minutes. A part of 250 μl of the vial gas was applied to GC. A fused silica capillary column was used as the GC column. If 16 μl of the sample solution had not been evaporated within 3 minutes in a vial, the headspace method was employed for the determination of TCE and the stabilizer. By this method, 20 commercial water proofing aerosol products were analyzed, and TCE was detected in 17 products in the range of 48.9-93.1%, DO was in 12 products, 1.42-2.17%, EB was in 14 products, 200-3100 ppm, NM was in 12 products, 500-2800 ppm, NE was in 3 products, 900-1000 ppm. Headspace method was employed for 2 products in 20.
