Hinoue Mitsuo, Hori Hajime
Department of Environmental Management, School of Health Sciences, University of Occupational and Environmental Health.
J UOEH. 2017;39(2):181-185. doi: 10.7888/juoeh.39.181.
For a new desorption method development for working environment measurement, desorption efficiency of organic solvent vapors from an activated carbon was examined using desorption solutions that consisted of anionic and nonionic surfactants. Ten μl of an aqueous solution of isopropyl alcohol or methyl ethyl ketone diluted with distilled water was spiked into a 10 ml vial with a coconut-shell-activated carbon (100 mg). The vial was left for 24 h, and 5 ml a desorption solution was added. Afterwards, the vial was put into an incubator at 60°C and left for 24 h, then the desorption efficiency was determined by analyzing the headspace gas in the vial with a gas chromatograph equipped with flame ionization detector. By adding one or four kinds of nonionic surfactants to the aqueous solution containing two kinds of anionic surfactants, the effect adding nonionic surfactant to the desorption efficiency was investigated, but improvement of desorption efficiency was not observed. On the other hand, desorption efficiency varied depending on the production lot of the coconut-shell-activated carbon tube used as the adsorbent.
为开发一种用于工作环境测量的新解吸方法，使用由阴离子和非离子表面活性剂组成的解吸溶液，研究了从活性炭中解吸出有机溶剂蒸气的效率。将10μl用蒸馏水稀释的异丙醇或甲乙酮水溶液加入到装有100mg椰壳活性炭的10ml小瓶中。小瓶放置24小时后，加入5ml解吸溶液。然后，将小瓶放入60°C的培养箱中放置24小时，接着用配备火焰离子化检测器的气相色谱仪分析小瓶中的顶空气体，以确定解吸效率。通过向含有两种阴离子表面活性剂的水溶液中添加一种或四种非离子表面活性剂，研究了添加非离子表面活性剂对解吸效率的影响，但未观察到解吸效率的提高。另一方面，解吸效率因用作吸附剂的椰壳活性炭管的生产批次而异。
