<b>Characteristic of Adsorbents for Total VOC Measurement by Solvent </b><b>Extraction, and Optimization of Desorption Method </b>

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  • 溶媒抽出法による総揮発性有機化合物（TVOC）測定に適した吸着材の特性と脱着方法の検討
  • ヨウバイ チュウシュツホウ ニ ヨル ソウ キハツセイ ユウキ カゴウブツ(TVOC)ソクテイ ニ テキシタ キュウチャクザイ ノ トクセイ ト ダッチャク ホウホウ ノ ケントウ

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<p>Total Volatile Organic Compound (TVOC) measurement is one of the effective methods which evaluate indoor air pollution by volatile organic compounds (VOCs). In order to carry out this TVOC measurement by solvent extraction method instead of thermal desorption method, pore structures of the adsorbents were evaluated for their applicability in the analysis of TVOC and extraction conditions of solvent extraction were optimized. The results of adsorption and desorption test show the following three point: adsorbents with micro pore area higher than 1000 m2/g absorb strongly the VOCs with boiling points lower than 100 ℃, the adsorbents with pore diameter higher than 2 nm were able to desorb polar VOCs efficiently and the adsorbents with mesopore ratio more than 30 % had high desorption ratio of VOCs such as styrene and trimethylbenzene that are difficult to desorb. In the optimization of the extraction conditions, ultrasonic extraction temperature and extraction solvent were examined. As the result of optimization, the optimum condition was 20～30 ℃ of temperature and carbon disulfide containing 5 % acetone was used as extraction solvent. In this condition, high adsorption and desorption efficiency were obtained in the 38 kinds of compounds examined in this research.</p>

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