Examination of a New Desorption Method for Solid Adsorption Method of Working Environment Measurement -Attempt to Improve Desorption Efficiency of Organic Solvents from a Coconut-Shell-Activated Carbon Using Surfactant Solutions-

Jazyk: japonština
Rok vydání: 2017
Předmět:
Zdroj: 産業医科大学雑誌 = Journal of UOEH. 39(2):181-185
Popis: 作業環境測定のための固体捕集法の新たな脱着法を開発するため,アニオンおよびノニオン界面活性 剤を用いた脱着溶液を使用し,ヤシ殻活性炭からの有機溶剤蒸気の脱着率を調べた.イソプロピルアルコールまた はメチルエチルケトンを蒸留水で100倍希釈した水溶液10 μlを, 10 mlバイアル瓶に入った100 mgのヤシ殻活性炭 に添加した.そのバイアル瓶を約24時間静置し,脱着溶液を5 ml添加した後, 60°Cの恒温槽に24時間静置し,バイ アル瓶の気相を水素炎イオン化検出器(FID)を備えたガスクロマトグラフで分析し,脱着率を求めた.脱着溶液に は, 2種類のアニオン界面活性剤を用いて作製した水溶液に, 4種類のノニオン界面活性剤をそれぞれまたはすべて 添加したものを用いたが,添加したノニオン界面活性剤による脱着率の向上は認められなかった.一方,吸着材とし て使用したヤシ殻活性炭管は,製造ロットにより脱着率が異なることが示された.
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.
Databáze: OpenAIRE