| Summary: | 碩士 === 高雄醫學大學 === 公共衛生學研究所 === 82 === The six major emission sources of benzene in Taiwan were manufacturing of benzene , use of benzene as industrial raw materials , waste gas emitted from automobile , waste gas emitted from gasoline stations , cigarette smoking , and usage of solvent mixtures. Exposure assessment of benzene emitted from usage of solvent mixtures has been difficult because of the variety of benzene content in lots of products. In this study , benzene-containing solvents were sampled and their benzene contents were analyzed. When solvents were used , the benzene concentration in the air was estimated using the volatile organic solvent evaporation models. Then , the benzene exposure dose of solvent user were assessed. Solvent products were collected from a random sample of those solvent sellers in Taipei、Taichung and Tainan , and were analyzed with GC/FID. Eighty among the 210 solvent samples contained benzene , and there are 40 samples whose benzene concentration were more than 0.1% ; and the highest content was 9%. The benzene concentration in the air was between 0.79 and 7851 ppm using benzene-containing solvents under the environmental conditions (15% of humidity、15℃ of temperature and 0.5Lpm of ventilation) in the winter of Taiwan ; and being between 6.64 and 65613 ppm (85%、35℃ and 0.5Lpm) in the summer. The hourly benzene exposure of solvent users was between 0.02 and 2860 mg/kg/day in male and 0.02∼3046 mg/kg/day in female ; and being between 0.13 and 22879 mg/kg/day in male and between 0.13 and 24369 mg/kg/dayin female for 8 hours work.
This study was partially sponsored by research grant from Environmental Protection Administration , R.O.C.
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