| 摘要: |
| 报道用于博物馆极低浓度H2S气体的快速在线检测方法.分别以氯化1-丁基-3-甲基咪唑(［Bmim］Cl)离子液体和铁基氯化1-丁基-3-甲基咪唑(Fe-［Bmim］Cl) 离子液体作为敏感材料,结合石英晶体微天平(QCM)技术用于H2S气体的检测.其中［Bmim］Cl涂膜晶振对H2S的频率响应为0.34 Hz·(L·μg-1)H2S,检测下限8.88 μg/L,Fe-［Bmim］Cl涂膜晶振对与H2S的频率响应为1.45 Hz·(L·μg-1)H2S,检测下限0.35 μg/L,该值已接近博物馆允许的H2S气体浓度0.2 μg/L.响应时间均小于60 s. |
| 关键词: Oddy法 石英晶体微天平 离子液体 硫化氢 |
| DOI： |
| 分类号: |
| 基金项目:“十一五”国家科技支撑计划 (2010BAK67B15) |
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| Quantitative characterization of Oddy test with quartz crystal microbalance combined with ionic liquid |
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CHEN Jianjian1, ZHOU Min1, YAN Yin2, CAI Lankun3
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1.College of Life and Environment Sciences,Shanghai Normal University;2.School of Resources and Environmental Engineering,East China University of Science and Technology;3.School of Resources and Environmental Engineering,East China University of Science and Technology
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| Abstract: |
| A quickin-situ method for detection of low concentration of H2S in museums was developed.1-Butyl-3-methylimidazolium chloride (［Bmim］Cl) and Iron based(1-Butyl-3-methylimidazolium chloride) (Fe-［Bmim］Cl) were choosed as sensitive materials for detection of H2S based on quartz crystal microbalance techniquerespectively.The frequency response of ［Bmim］Cl to H2S is 0.34 Hz/(μg/L)H2S,and its the lower detection limit is 2.96 μg/L.The frequency response of Fe-［Bmim］Cl to H2S is 1.45 Hz/(μg/L)H2S,and the its lower detection limit is 0.35 μg/L,which is close to the maximum concentration of H2S permitted by museums (0.2 μg/L).The response time is less than 1min for both types of ionic liquid membranes. |
| Key words: Oddy test quartz crystal microbalance ionic liquid hydrogen sulfide |
