| 膜进样-单光子电离/化学电离-质谱仪在线检测水中VOCs |
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| 引用本文： | 花磊,吴庆浩,侯可勇,崔华鹏,陈平,赵无垛,谢园园,李海洋.膜进样-单光子电离/化学电离-质谱仪在线检测水中VOCs[J].环境科学,2011,32(12):3628-3634. |
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| 作者姓名： | 花磊 吴庆浩 侯可勇 崔华鹏 陈平 赵无垛 谢园园 李海洋 |
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| 作者单位： | 1. 中国科学院大连化学物理研究所,大连116023／中国科学院研究生院,北京100049
2. 中国科学院大连化学物理研究所,大连,116023 |
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| 基金项目： | 中国科学院仪器装备计划项目(YZ200907,KZCX2-YW-JS402);辽宁省博士启动基金项目(Y034090105) |
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| 摘 要： | 介绍了自行研制的膜进样-单光子电离/化学电离-飞行时间质谱仪.光子能量为10.6 eV的真空紫外灯作为单光子电离的光源,同时利用光电子电离产生O 2＋试剂离子,用于待测物分子的化学电离,通过调节电离区的电场条件可在2 s之内实现2种电离模式的快速切换.水中挥发性有机物（VOCs）以50μm的硅橡胶膜进行快速富集,膜后加入吹扫气加快样品脱附,吹扫气体还可抑制质谱分析器中油气本底,提高信噪比.SPI模式下,甲基叔丁基醚的检出限达到2μg·L-1（10 s分析时间）;SPI-CI模式下,三氯甲烷检出限达到1μg·L-1（10 s分析时间）.该仪器已成功应用于模拟加油站附近地下水中的甲基叔丁基醚和饮用水消毒副产物中的挥发性有机物的快速检测.结果表明该仪器在水中挥发性有机物在线检测方面有着广阔的应用前景.
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| 关 键 词： | 飞行时间质谱 膜进样 单光子电离 化学电离 挥发性有机物 在线检测 |
| 收稿时间： | 2011/5/25 0:00:00 |
| 修稿时间： | 2011/7/12 0:00:00 |
Development of a Membrane Inlet-Single Photon Ionization/Chemical Ionization-Mass Spectrometer for Online Analysis of VOCs in Water |
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| HUA Lei,WU Qing-hao,HOU Ke-yong,CUI Hua-peng,CHEN Ping,ZHAO Wu-duo,XIE Yuan-yuan and LI Hai-yang.Development of a Membrane Inlet-Single Photon Ionization/Chemical Ionization-Mass Spectrometer for Online Analysis of VOCs in Water[J].Chinese Journal of Environmental Science,2011,32(12):3628-3634. |
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| Authors: | HUA Lei WU Qing-hao HOU Ke-yong CUI Hua-peng CHEN Ping ZHAO Wu-duo XIE Yuan-yuan and LI Hai-yang |
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| Institution: | Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China |
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| Abstract: | A home-made membrane inlet-single photon ionization/chemical ionization-time-of-flight mass spectrometer has been described.A vacuum ultraviolet(VUV) lamp with photon energy of 10.6 eV was used as the light source for single photon ionization(SPI).Chemical ionization(CI) was achieved through ion-molecule reactions with O+2 reactant ions generated by photoelectron ionization.The two ionization modes could be rapidly switched by adjusting electric field in the ionization region within 2 s.Membrane inlet syste... |
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| Keywords: | time-of-flight mass spectrometer membrane inlet single photon ionization chemical ionization volatile organic compounds online analysis |
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